期刊：
CHEMICAL SOCIETY REVIEWS,2025年54(8):3775-3818 ISSN：0306-0012
通讯作者：
Zhang, Suojiang;Zhang, HT
作者机构：
[Wei, Zewei; Zhang, Haitao; Zhang, Suojiang; Zhang, Yalin; Zhang, SJ; Yuan, Xuedi] Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Solid State Battery & Energy Stora, Beijing 100190, Peoples R China.;[Yuan, Du] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Ma, Jianmin] Tiangong Univ, Sch Chem, Tianjin 300387, Peoples R China.
通讯机构：
[Zhang, HT ; Zhang, SJ] C;Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Solid State Battery & Energy Stora, Beijing 100190, Peoples R China.
摘要：
The energy density of lithium-ion batteries (LIBs) is primarily determined by the working potential of devices and the specific capacity of cathode compounds. Carbonate-based electrolytes have received considerable attention due to their significance for advancing current cell-assembly process. However, the commercially available liquid LiPF(6) based electrolytes cannot withstand the harsh high-voltage environment and the effects of cathode, due to issues such as the undesired oxidative decomposition of ethylene carbonate (EC), the catalytic influence of dissolved transition metal ions (TMs), and the poor performance of interphases with unstable morphologies and components. Furthermore, the complex working mechanisms of high-voltage electrolytes (HVEs) are not fully understood. This review presents a comprehensive summary of the HVEs, including their physical properties, solvation structures, and interface chemistry. Specifically, chemical environment of high-voltage cathode compounds and failure mechanisms of commercial electrolytes are investigated, followed by a discussion of expected functions of HVEs. Then, screening criteria for single-component electrolytes, considering their oxidation resistance and decomposition mechanism, and screening mechanism of interphase species are explored based on their energy level positions. Next, a cross-scale evolution framework is proposed, from the solvation structure to interphase characteristics, aimed at uncovering the formulation principles and synergistic effects of HVEs. Operational mechanisms are systematically scrutinized, starting from the conventional tuning of solvation structure to the incorporation of multiple components and further to the role of entropy-driven effects, all of which will favor the understanding of formulation principles and synergistic effects. Finally, integration of advanced computational methods and mature experimental techniques is expected to foster the development of novel perspectives and promising electrolyte candidates.
作者：
Liu, D. H.;Chen, X. Z.;Sun, R.;Wu, X.;Bai, H. W.;...
期刊：
Journal of Materials Research and Technology,2025年35:7204-7214 ISSN：2238-7854
通讯作者：
Liu, X;Gao, Y
作者机构：
[Chen, X. Z.; Sun, R.; Wu, X.; Bai, H. W.; Liu, D. H.; Liu, X. C.] Changsha Univ Sci & Technol, Inst Met, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Gao, Y. H.] North Univ China, Sch Aerosp Engn, Taiyuan 030051, Peoples R China.;[Zhao, Y. F.] North Univ China, Sch Mech Engn, Taiyuan 030051, Peoples R China.
通讯机构：
[Gao, Y ] N;[Liu, X ] C;Changsha Univ Sci & Technol, Inst Met, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;North Univ China, Sch Aerosp Engn, Taiyuan 030051, Peoples R China.
关键词：
Al alloys;Microalloying;Interfacial segregation;Dispersoid;Precipitation
摘要：
Manganese (Mn) is widely recognized for its effect on modifying the size and morphology of coarse Fe-rich constituents in Al-based alloys by forming fine Mn-rich dispersoids. However, this study suggests that in a Cd-micraolloyed Al–Cu–Mn-based alloy, Mn-rich dispersoids significantly promote Cu-rich precipitation at the interface during artificial aging (AA), leading to undesirable solute consumption of Cu and potential suppression of nanoprecipitation. With the help of atomic-resolution high-angle annular dark-field (HAADF) scanning transmission electron microscopy (STEM) and energy dispersive spectroscopy (EDS), an interesting finding is that interfacial Cu segregation at the dispersoid/matrix interface can be assembled during natural aging (NA, approximately for ∼30 days) after quenching, consequently feeding the early-stage interfacial Cu-rich precipitation during AA. Intriguingly, the microalloying effect of Cd, as the fast diffuser, is highly possible to promotes this process, which is also simultaneously and increasingly collected by the dispersoids during AA. These findings are expected to provide new insights on microstructural architecture in multicomponent Al–Cu-based alloys, highlighting the synergistic effect between Cd microalloying and Mn-rich dispersoids.
Manganese (Mn) is widely recognized for its effect on modifying the size and morphology of coarse Fe-rich constituents in Al-based alloys by forming fine Mn-rich dispersoids. However, this study suggests that in a Cd-micraolloyed Al–Cu–Mn-based alloy, Mn-rich dispersoids significantly promote Cu-rich precipitation at the interface during artificial aging (AA), leading to undesirable solute consumption of Cu and potential suppression of nanoprecipitation. With the help of atomic-resolution high-angle annular dark-field (HAADF) scanning transmission electron microscopy (STEM) and energy dispersive spectroscopy (EDS), an interesting finding is that interfacial Cu segregation at the dispersoid/matrix interface can be assembled during natural aging (NA, approximately for ∼30 days) after quenching, consequently feeding the early-stage interfacial Cu-rich precipitation during AA. Intriguingly, the microalloying effect of Cd, as the fast diffuser, is highly possible to promotes this process, which is also simultaneously and increasingly collected by the dispersoids during AA. These findings are expected to provide new insights on microstructural architecture in multicomponent Al–Cu-based alloys, highlighting the synergistic effect between Cd microalloying and Mn-rich dispersoids.
作者机构：
[Wenjie Peng; Huajun Guo; Junchao Zheng; Guochun Yan; Hui Duan; Xing Ou; Yucen Yan; Zhixing Wang; Zilan Zhao; Jiexi Wang; Junjie Wang; Wang, Jiexi] Cent South Univ, Sch Met & Environm, Natl Energy Met Resources & New Mat Key Lab, Engn Res Ctr,Minist Educ Adv Battery Mat,Hunan Pro, Changsha 410083, Peoples R China.;[Jiayi Li] Univ Washington, Dept Chem, Seattle, WA 98195 USA.;[Duo Deng; Wenjie Peng; Zhixing Wang; Gui Luo] BASF Shanshan Battery Mat Co LTD, Res Inst, Changsha 410205, Peoples R China.;[Wenjie Peng; Huajun Guo; Guochun Yan; Hui Duan; Mingxia Dong; Wang, Jiexi] Natl Engn Res Ctr Anvanced Energy Storage Mat, Changsha 410205, Peoples R China.;[Lingjun Li] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Peoples R China.
通讯机构：
[Wang, JX ] C;Cent South Univ, Sch Met & Environm, Natl Energy Met Resources & New Mat Key Lab, Engn Res Ctr,Minist Educ Adv Battery Mat,Hunan Pro, Changsha 410083, Peoples R China.
关键词：
Lithium ion battery;LiNiO 2;Tungsten doping;Grain boundary phase;H2↔H3 phase transition
摘要：
LiNiO 2 (LNO) is one of the most promising cathode materials for lithium-ion batteries. Tungsten element in enhancing the stability of LNO has been researched extensively. However, the understanding of the specific doping process and existing form of W are still not perfect. This study proposes a lithium-induced grain boundary phase W doping mechanism. The results demonstrate that the introduced W atoms first react with the lithium source to generate a Li–W–O phase at the grain boundary of primary particles. With the increase of lithium ratio, W atoms gradually diffuse from the grain boundary phase to the interior layered structure to achieve W doping. The feasibility of grain boundary phase doping is verified by first principles calculation. Furthermore, it is found that the Li 2 WO 4 grain boundary phase is an excellent lithium ion conductor, which can protect the cathode surface and improve the rate performance. The doped W can alleviate the harmful H2↔H3 phase transition, thereby inhibiting the generation of microcracks, and improving the electrochemical performance. Consequently, the 0.3 wt% W-doped sample provides a significant improved capacity retention of 88.5 % compared with the pristine LNO (80.7 %) after 100 cycles at 2.8–4.3 V under 1C.
LiNiO 2 (LNO) is one of the most promising cathode materials for lithium-ion batteries. Tungsten element in enhancing the stability of LNO has been researched extensively. However, the understanding of the specific doping process and existing form of W are still not perfect. This study proposes a lithium-induced grain boundary phase W doping mechanism. The results demonstrate that the introduced W atoms first react with the lithium source to generate a Li–W–O phase at the grain boundary of primary particles. With the increase of lithium ratio, W atoms gradually diffuse from the grain boundary phase to the interior layered structure to achieve W doping. The feasibility of grain boundary phase doping is verified by first principles calculation. Furthermore, it is found that the Li 2 WO 4 grain boundary phase is an excellent lithium ion conductor, which can protect the cathode surface and improve the rate performance. The doped W can alleviate the harmful H2↔H3 phase transition, thereby inhibiting the generation of microcracks, and improving the electrochemical performance. Consequently, the 0.3 wt% W-doped sample provides a significant improved capacity retention of 88.5 % compared with the pristine LNO (80.7 %) after 100 cycles at 2.8–4.3 V under 1C.
关键词：
Powder bed fusion;Beta titanium;Three-point bending;Transformation-induced plasticity (TRIP);Twinning-induced plasticity (TWIP)
摘要：
Compared to other loading conditions, studies on deformation mechanisms of additive manufacturing (AM)-produced β-type Ti alloys under bending remain limited. This study investigates a metastable β-type Ti–25Nb–3Zr–3Mo–2Sn (TLM, wt.%) alloy fabricated via laser powder bed fusion (L-PBF) during in-situ three-point bending. In-situ observations using scanning electron microscopy (SEM) combined with electron backscatter diffraction (EBSD) and ex-situ transmission electron microscopy (TEM) imaging during bending provided evaluation of microstructural changes and deformation mechanisms. These mechanisms are characterized by dislocation slip, {332}<113> β deformation twin, α" phase, and ω phase formation during plastic bending stage. The {112}<111> slip system dominates in the compression zone, while the {123}<111> slip system governs in the tension zone during bending. The synergistic effect of twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) significantly enhances the ductility of L-PBF-produced TLM alloy. The deformation involves stress-induced α" and ω phases, with the latter can form within grains/twinning band and at twinning boundaries. Importantly, the presence of the interfacial twin boundary (ITB)-ω thin layers at twinning band boundaries exerts a pinning effect, restraining the outward extension of stress-induced α" phase. This mechanism suggests optimized utilization of space within twinning bands, facilitating α" nucleation and uniform growth, thereby providing insights into further enhancing ductility.
Compared to other loading conditions, studies on deformation mechanisms of additive manufacturing (AM)-produced β-type Ti alloys under bending remain limited. This study investigates a metastable β-type Ti–25Nb–3Zr–3Mo–2Sn (TLM, wt.%) alloy fabricated via laser powder bed fusion (L-PBF) during in-situ three-point bending. In-situ observations using scanning electron microscopy (SEM) combined with electron backscatter diffraction (EBSD) and ex-situ transmission electron microscopy (TEM) imaging during bending provided evaluation of microstructural changes and deformation mechanisms. These mechanisms are characterized by dislocation slip, {332}<113> β deformation twin, α" phase, and ω phase formation during plastic bending stage. The {112}<111> slip system dominates in the compression zone, while the {123}<111> slip system governs in the tension zone during bending. The synergistic effect of twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) significantly enhances the ductility of L-PBF-produced TLM alloy. The deformation involves stress-induced α" and ω phases, with the latter can form within grains/twinning band and at twinning boundaries. Importantly, the presence of the interfacial twin boundary (ITB)-ω thin layers at twinning band boundaries exerts a pinning effect, restraining the outward extension of stress-induced α" phase. This mechanism suggests optimized utilization of space within twinning bands, facilitating α" nucleation and uniform growth, thereby providing insights into further enhancing ductility.
摘要：
Non-fluorinated polymer membranes offer a commercially feasible solution for redox flow batteries (RFBs), yet their practical applications have been hampered by inherent challenges such as chemical instability and low ionic conductivity. In this study, the development of a series of ether-bond-free poly(aryl piperidine) membranes that address these limitations by introducing enhanced disorder in polymer chain packing through supramolecular interactions with organic acids, is presented. These interactions effectively disrupt densely packed polymer chains, transforming proton-inaccessible crystalline regions into accessible amorphous ones. By eliminating chemically unstable aryl ether bonds and avoiding additional chemical modifications, these membranes exhibit remarkable long-term chemical stability. The presence of abundant interchain gaps further facilitates rapid proton-selective transport. As a result, the engineered membranes demonstrate sustained performance in vanadium RFBs, maintaining stable operation for over 1000 charge/discharge cycles, and achieving an impressive energy efficiency of 80% at a high current density of 280 mA cm-2. The combination of experimental data and theoretical modeling suggests that the membrane's outstanding performance arises from the interconnected and widely distributed interchain gaps, which exhibit a pore-limiting diameter of approximate to 8 & Aring;. These findings offer a robust design strategy for developing chemically stable, high-performance non-fluorinated membranes for RFBs and related energy conversion devices.
摘要：
Traditional methods for fabricating high-performance bulk graphites (HPBGs) are time-consuming and energy-intensive. There is a high demand for new preparation techniques and raw materials, but developing them remains a critical and challenging task. Herein a novel self-sintering glucose-polyacrylamide hydrogel powder (GPHP) was developed using glucose-hydrogel carbonization method. By combining hot-pressing and carbonization, dense, uniform, and single-phase sugar-derived bulk carbons (SDBCs) were successfully fabricated without additional binders or complex processing steps. The self-sintering mechanism of GPHP involved chemical bonding during hot pressing and polycondensation during carbonization, resulting in monolithic carbon materials with high density and superior mechanical properties. SDBC-2, prepared using optimally sized and shaped GPHP, exhibited exceptional properties, including a compressive strength of 374 MPa, a flexural strength of 120 MPa, and a Young’s modulus of 35 GPa, and a Vickers hardness of 2.68 GPa. Furthermore, SDBC-2 demonstrated excellent tribological properties, with a low friction coefficient and superior wear resistance. This study provides a sustainable and efficient method for developing high-performance carbon materials from renewable sugar resources.
Traditional methods for fabricating high-performance bulk graphites (HPBGs) are time-consuming and energy-intensive. There is a high demand for new preparation techniques and raw materials, but developing them remains a critical and challenging task. Herein a novel self-sintering glucose-polyacrylamide hydrogel powder (GPHP) was developed using glucose-hydrogel carbonization method. By combining hot-pressing and carbonization, dense, uniform, and single-phase sugar-derived bulk carbons (SDBCs) were successfully fabricated without additional binders or complex processing steps. The self-sintering mechanism of GPHP involved chemical bonding during hot pressing and polycondensation during carbonization, resulting in monolithic carbon materials with high density and superior mechanical properties. SDBC-2, prepared using optimally sized and shaped GPHP, exhibited exceptional properties, including a compressive strength of 374 MPa, a flexural strength of 120 MPa, and a Young’s modulus of 35 GPa, and a Vickers hardness of 2.68 GPa. Furthermore, SDBC-2 demonstrated excellent tribological properties, with a low friction coefficient and superior wear resistance. This study provides a sustainable and efficient method for developing high-performance carbon materials from renewable sugar resources.
期刊：
Advanced Energy Materials,2025年15(19):2404933 ISSN：1614-6832
通讯作者：
Richard, Marie-Ingrid;Schulli, T;Richard, MI
作者机构：
[Richard, Marie-Ingrid; Schulli, T; Zatterin, Edoardo; Richard, MI; Schulli, Tobias; Leake, Steven; Colalongo, Mattia; Martens, Isaac; Vostrov, Nikita] ESRF The European Synchrotron, 71 Ave Martyrs, Grenoble, France.;[Ronovsky, Michal] Univ Grenoble Alpes, CNRS, Grenoble INP, LEPMI, F-38402 St Martin Dheres, France.;[Boulineau, Adrien] Univ Grenoble Alpes, CEA Liten, F-38000 Grenoble, France.;[Zhu, Xiaobo] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China.;[Wang, Lianzhou] Univ Queensland, Nanomat Ctr, Sch Chem Engn, St Lucia, Qld 4072, Australia.
通讯机构：
[Schulli, T ; Richard, MI] E;[Richard, MI ] U;ESRF The European Synchrotron, 71 Ave Martyrs, Grenoble, France.;Univ Grenoble Alpes, CEA Grenoble, IRIG, MEM,NRX, 17 Rue Martyrs, F-38000 Grenoble, France.
关键词：
high voltage cathode;Li-ion batteries;LMNO;spinel;SXDM
摘要：
AbstractThe nanoscale mechanisms of ion deintercalation in battery cathode materials remain poorly understood, especially the relationship between crystallographic defects (dislocations, small angle grain boundaries, vacancies, etc), device performance, and durability. In this work, operando scanning X‐ray diffraction microscopy (SXDM) and multi‐crystal X‐ray diffraction (MCXD) are used to investigate microstrain and lattice tilt inhomogeneities inside Li1 − x Ni0.5Mn1.5O4 cathode particles during electrochemical cycling and their influence on the material degradation. Using these techniques, microscale lattice degradation mechanisms are investigated inside single crystals, extend it to an inter‐particle scale, and correlate it with the long‐term degradation of the cathode. During cycling, a crystal lattice deformation is observed, associated with phase transitions and inherent lattice defects in the measured particle. Residual misorientations are observed in the structure even after full discharge, indicating an irreversible structural change of the lattice. However, after long‐term cycling such lattice misorientations together with active material dissolution are further exacerbated only in a subset of particles, suggesting high heterogeneity of degradation mechanisms between the cathode particles. Selective degradation of particles could be caused by varying crystal quality across the sample, highlighting the need for a deep understanding of defect microstructures to enable a more rational design of materials with enhanced durability.
摘要：
SiCnw with special morphology, such as bamboo-like and beaded shapes, has better reinforcing effect on metal and ceramic-based composite coatings. In this study, SiCnw was prepared in situ on the surface of C/C composites by chemical vapor reaction (CVR) method using Si, SiO 2 and graphite as raw materials. The effects of heat treatment temperature, holding time and raw material ratio on the growth of SiCnw were investigated. The synthesized SiCnw is 3C-SiC with diameters between 100 nm and 300 nm and lengths up to tens of micrometers. Due to the influence of Si, SiO and CO saturation vapor pressures, with the heat treatment temperature and holding time increase, SiCnw’s yield increases and diameter becomes more homogeneous. The optimal preparation process for SiCnw was heat treatment at 1600 ℃ for 3 h. And SiCnw grows in different forms depending on the ration of raw material, such as hexagonal prisms (SiO 2 : 70%, Si:25%, C:5%), linear (SiO 2 : 70%, Si:20%, C:10%), pagod-like and needle-pricked shapes (SiO 2 : 60%, Si:25%, C:15%). The growth of SiCnw followed the vapor-solidification (VS) and spiral dislocation growth mechanism, grow in the direction of [111], and forms a tapered tip and leaves a cylindrical nanofilament at the tip.
SiCnw with special morphology, such as bamboo-like and beaded shapes, has better reinforcing effect on metal and ceramic-based composite coatings. In this study, SiCnw was prepared in situ on the surface of C/C composites by chemical vapor reaction (CVR) method using Si, SiO 2 and graphite as raw materials. The effects of heat treatment temperature, holding time and raw material ratio on the growth of SiCnw were investigated. The synthesized SiCnw is 3C-SiC with diameters between 100 nm and 300 nm and lengths up to tens of micrometers. Due to the influence of Si, SiO and CO saturation vapor pressures, with the heat treatment temperature and holding time increase, SiCnw’s yield increases and diameter becomes more homogeneous. The optimal preparation process for SiCnw was heat treatment at 1600 ℃ for 3 h. And SiCnw grows in different forms depending on the ration of raw material, such as hexagonal prisms (SiO 2 : 70%, Si:25%, C:5%), linear (SiO 2 : 70%, Si:20%, C:10%), pagod-like and needle-pricked shapes (SiO 2 : 60%, Si:25%, C:15%). The growth of SiCnw followed the vapor-solidification (VS) and spiral dislocation growth mechanism, grow in the direction of [111], and forms a tapered tip and leaves a cylindrical nanofilament at the tip.
作者机构：
[Wang, Jiaoli; Huang, Zimo; Liu, Yexiang; Bai, Maohui; Hong, Bo] Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China.;[Wang, Xuhui; Bai, Maohui] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Liu, Yexiang; Hong, Bo] Cent South Univ, Hunan Prov Key Lab Nonferrous Value Added Met, Changsha 410083, Peoples R China.
通讯机构：
[Bai, MH ] C;Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China.;Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
关键词：
Pentaerythritol acrylate;N,N-dimethylacrylamide;Cross-linking gel electrolyte;Oxidation stability;Lithium-ion batteries
摘要：
Nitrogen-containing gel electrolyte has the advantages of high safety and strong compatibility, which can improve the electrochemical performance of lithium-ion batteries (LIBs). However, its inherent issues of oxidation stability and insufficient conductivity limit its large-scale application. Here, Pentaerythritol acrylate (PETEA) is used as a cross-linking agent to build a cross-linking framework with nitrogen-containing N,N-dimethylacrylamide (PNDA) gel monomer to improve the electrochemical performance of gel electrolyte (PNDET). The three-dimensional cross-linked PNDET electrolyte has a continuous Li-ion fast conduction network (7.02 mS cm-1), and its self-supporting structure improves its mechanical strength (220.0 MPa). Meanwhile, through calculation, PNDET has a lower HOMO energy level, which increases its oxidation voltage from 4.3 to 4.5 V. In addition, the cross-linked PNDET enhances the overall thermal stability of the electrolyte, and the flame retardant properties of the nitrogen-containing skeleton are significantly improved. When the PNDET matched with Ah-class NCM811/Gr pouch cells, the capacity retention rate still remains 93.5% after 600 cycles at the temperature of 60 degrees C. However, due to its extremely poor oxidation stability and thermal stability, the capacity of pouch cells with PNDA electrolyte rapidly decreases at high voltage of 4.35 V and high temperature of 60 degrees C. The cross linking strategy provides a direction for the practical application of gel electrolyte and promotes the development of gel semi-solid battery.
通讯机构：
[Jiang, Y; Zhang, JJ ] S;[Chen, ZY ; Duan, JF] C;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Peoples R China.;Shanghai Univ, Sch Environm & Chem Engn, Shanghai Key Lab Atom Control & Applicat Inorgan 2, Shanghai 200444, Peoples R China.
关键词：
hard carbon anodes;pore structure modulation;sodium ion batteries;sodium storage mechanism;ultramicropores
摘要：
Regulating the microstructure of hard carbon (HC) anodes has emerged as a popular strategy to enhance the application potential of sodium-ion batteries (SIBs). However, the low platform capacity and inferior rate property remain significant barriers to their further development. Herein, HC materials with abundant ultramicropores (0.3-0.8 nm) are prepared employed epoxy resin and zinc acetate as precursors. Benefiting from the abundant hydroxyl and epoxy groups, the synergistic generation of simple aromatic free radicals and the precipitated ZnO promote the cross-linking between precursor molecules during the first-step pyrolysis, alter the twisting and folding of carbon layers during high-temperature calcniantion, thereby precisely regulating the micropore structure of HC. Owing to its abundant ultramicropore structure and the boosted Na + transfer dynamics, the optimal anode demonstrates a superior plateau capacity of 256.2 mAh g −1 at 30 mA g −1 (408.0 mAh g −1 reversible capacity) and rate capability of 317.0 mAh g −1 at 1 A g −1 , outperforming most other resin-derived carbon materials. In situ Raman combined with in situ XRD testing results demonstrate that the well-designed HC presents a typical “adsorption-intercalation-pore filling” sodium storage mechanism. This work provides a theoretical basis and experimental guidance for high-performance HC derived from epoxy resin, which is essential for advancements in SIBs.
关键词：
Domestic waste incineration fly ash;Ceramic foams;Flexural strength;Heavy metal leaching;Thermal phase transition model
摘要：
In this study, ceramic foams were prepared from domestic waste incineration fly ash. The physical and mechanical properties of ceramic foams were studied systematically. The bulk density, open porosity, water absorption rate was 3.04 g/cm 3 , 1.01 %, and 4.04 %, respectively. Especially, the flexural strength was 20.63 MPa, the thermal conductivity was 0.2721 W/(m K) (25 °C) and the heavy metal leaching concentration was 0.5442 mg/L (Pb). By analyzing the thermal phase transition of sintering process for ceramic foams, the thermal phase transition model during the sintering process of high-calcium and low-silicon domestic waste incineration fly ash-based ceramic foams is discussed. Therefore, the use of fly ash from domestic waste incineration to prepare ceramic foams can turn waste into treasure and realize the resource utilization of fly ash.
In this study, ceramic foams were prepared from domestic waste incineration fly ash. The physical and mechanical properties of ceramic foams were studied systematically. The bulk density, open porosity, water absorption rate was 3.04 g/cm 3 , 1.01 %, and 4.04 %, respectively. Especially, the flexural strength was 20.63 MPa, the thermal conductivity was 0.2721 W/(m K) (25 °C) and the heavy metal leaching concentration was 0.5442 mg/L (Pb). By analyzing the thermal phase transition of sintering process for ceramic foams, the thermal phase transition model during the sintering process of high-calcium and low-silicon domestic waste incineration fly ash-based ceramic foams is discussed. Therefore, the use of fly ash from domestic waste incineration to prepare ceramic foams can turn waste into treasure and realize the resource utilization of fly ash.
摘要：
Micro-nanobubbles (MNBs), as an emerging environmental-friendly technology, have shown great potential in enhancing advanced oxidation processes for water treatment. This study innovatively integrated MNBs with a biochar-supported cobalt-iron catalyst (CoFe/BC) and persulfate (PDS) system, creating a novel synergistic approach for tetracycline (TC) degradation. The CoFe/BC+PDS+MNB system achieved 95.63% TC degradation efficiency under optimized conditions (50 mg/L catalyst, 30 mg/L TC, 400 mg/L PDS), outperforming the conventional system with half the catalyst. While CO 3 2- and HCO 3 - inhibited TC degradation, NO 3 - , H 2 PO 4 - , and humic acid showed minimal interference. Mechanistic studies revealed that singlet oxygen ( 1 O 2 ), sulfate radicals (SO 4 •- ), and hydroxyl radicals (•OH) were the primary reactive species. MNBs facilitated electron transfer between dissolved oxygen (DO) and CoFe/BC, while bubble collapse generated localized •OH hotspots. Electrostatic attraction between MNBs and CoFe/BC under acidic conditions (pH 3-6.2) improved DO conversion efficiency, while MNB stability at neutral-alkaline pH ensured sustained degradation (>91% at pH 7-9). Despite pH sensitivity, the synergistic effect maintained efficient degradation across a broad pH range. This study demonstrates the potential of MNBs integration in persulfate-based advanced oxidation processes for water treatment applications.
Micro-nanobubbles (MNBs), as an emerging environmental-friendly technology, have shown great potential in enhancing advanced oxidation processes for water treatment. This study innovatively integrated MNBs with a biochar-supported cobalt-iron catalyst (CoFe/BC) and persulfate (PDS) system, creating a novel synergistic approach for tetracycline (TC) degradation. The CoFe/BC+PDS+MNB system achieved 95.63% TC degradation efficiency under optimized conditions (50 mg/L catalyst, 30 mg/L TC, 400 mg/L PDS), outperforming the conventional system with half the catalyst. While CO 3 2- and HCO 3 - inhibited TC degradation, NO 3 - , H 2 PO 4 - , and humic acid showed minimal interference. Mechanistic studies revealed that singlet oxygen ( 1 O 2 ), sulfate radicals (SO 4 •- ), and hydroxyl radicals (•OH) were the primary reactive species. MNBs facilitated electron transfer between dissolved oxygen (DO) and CoFe/BC, while bubble collapse generated localized •OH hotspots. Electrostatic attraction between MNBs and CoFe/BC under acidic conditions (pH 3-6.2) improved DO conversion efficiency, while MNB stability at neutral-alkaline pH ensured sustained degradation (>91% at pH 7-9). Despite pH sensitivity, the synergistic effect maintained efficient degradation across a broad pH range. This study demonstrates the potential of MNBs integration in persulfate-based advanced oxidation processes for water treatment applications.
期刊：
Chemical Engineering Journal,2025年504:158517 ISSN：1385-8947
通讯作者：
Ou, X;Fu, Chaochao;Shen, JX;Bai, MH
作者机构：
[Zhang, Zhi; Zhu, Wenqi; Liao, Tong; Zhang, Dongsheng] Hunan Univ Arts & Sci, Coll Chem & Mat Engn, Hunan Prov Key Lab Water Treatment Funct Mat, Changde 415000, Peoples R China.;[Gao, Shuai; Zhang, Zhi; Ou, Xing] Cent South Univ, Engn Res Ctr Minist Educ Adv Battery Mat, Sch Met & Environm, Changsha 410083, Peoples R China.;[Guo, Haipeng] Feng Fan Co LTD, Baoding 071002, Peoples R China.;[Fu, Chaochao; Wang, Yi; Shen, Jixue; Fu, CC] Hebei Univ, Hebei Technol Innovat Ctr Lightweight New Energy V, Sch Qual & Tech Supervis, Baoding 071002, Peoples R China.;[Bai, Maohui] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
通讯机构：
[Shen, JX ; Fu, CC] H;[Bai, MH ; Ou, X ] C;Cent South Univ, Engn Res Ctr Minist Educ Adv Battery Mat, Sch Met & Environm, Changsha 410083, Peoples R China.;Hebei Univ, Hebei Technol Innovat Ctr Lightweight New Energy V, Sch Qual & Tech Supervis, Baoding 071002, Peoples R China.;Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
关键词：
Interfacial chemistry;Elevated temperature;High-voltage;Lithium-ion pouch full cell;Multicomponent additives
摘要：
The interfacial chemistry influenced by electrolyte components, including lithium salts, solvents, and additives, has attracted significant attention for its critical role in advancing high-performance lithium-ion batteries (LIBs). However, the instability of interfacial interactions between traditional electrolytes and electrodes presents a major obstacle to achieving optimal LIB performance, especially in conditions of high temperature and cut-off voltage. This work introduces an interfacial engineering method utilizing a combination of additives − specifically, fluoroethylene carbonate, ethylene sulfate, and propane sultone (referred to as FDP) − to enhance the conventional carbonate electrolyte for applications in high-voltage and high-temperature LIBs. These additives effectively adjust the interactions between lithium ions and solvents, reducing desolvation energy, thereby decreasing gas evolution, mitigating extensive solvent decomposition, and promoting the formation of a thin, uniform, low-impedance elastic interfacial film on both the anode and cathode. Noteworthy results include a 97.3 % capacity retention at 4.4 V over 250 cycles at 45 °C in a 1.7 Ah-level single crystal LiNi0.6Co0.1Mn0.3O2 (SC-NCM613)||graphite pouch full cell incorporating FDP additives. This interfacial engineering approach facilitated by these multicomponent additives presents a highly promising and practical pathway for achieving long-lasting high-voltage and high-temperature LIBs.
The interfacial chemistry influenced by electrolyte components, including lithium salts, solvents, and additives, has attracted significant attention for its critical role in advancing high-performance lithium-ion batteries (LIBs). However, the instability of interfacial interactions between traditional electrolytes and electrodes presents a major obstacle to achieving optimal LIB performance, especially in conditions of high temperature and cut-off voltage. This work introduces an interfacial engineering method utilizing a combination of additives − specifically, fluoroethylene carbonate, ethylene sulfate, and propane sultone (referred to as FDP) − to enhance the conventional carbonate electrolyte for applications in high-voltage and high-temperature LIBs. These additives effectively adjust the interactions between lithium ions and solvents, reducing desolvation energy, thereby decreasing gas evolution, mitigating extensive solvent decomposition, and promoting the formation of a thin, uniform, low-impedance elastic interfacial film on both the anode and cathode. Noteworthy results include a 97.3 % capacity retention at 4.4 V over 250 cycles at 45 °C in a 1.7 Ah-level single crystal LiNi0.6Co0.1Mn0.3O2 (SC-NCM613)||graphite pouch full cell incorporating FDP additives. This interfacial engineering approach facilitated by these multicomponent additives presents a highly promising and practical pathway for achieving long-lasting high-voltage and high-temperature LIBs.
摘要：
The catalyst-free growth of vertically oriented graphene (VG) networks with growth rate of about 5 nm/min on commercial aluminum (Al) foil via radio frequency plasma-enhanced chemical vapor deposition (RF-PECVD) is reported. The effects of process parameters, including precursor type and deposition temperature, on VG synthesis were systematically investigated. The deposition temperature plays a decisive role in the formation of VGs, while the precursor primarily influences growth rate and crystallinity. VGs were synthesized using either ethylene (C 2 H 4 ) or propylene (C 3 H 6 ) as precursors, but formation does not occur at lower temperatures (e.g., 500 °C). Precursors that effectively generate carbon dimers and exhibit a higher H:C ratio are more favorable for achieving VGs with high growth rates and superior crystallinity. Furthermore, we proposed a deposition mechanism that encompasses both the growth of VGs on the Al foil surface and the diffusion of carbon atoms into the Al foil. The growth process of VGs follows three distinct stages: the formation of buffer carbon nanoislands, nucleation, and subsequent growth. X-ray photoelectron spectroscopy (XPS) revealed the chemical interactions between carbon, Al x O y , and metallic Al at the interface, resulting in a diffusion layer and an interface layer between the VG layer and the underlying Al substrate.
The catalyst-free growth of vertically oriented graphene (VG) networks with growth rate of about 5 nm/min on commercial aluminum (Al) foil via radio frequency plasma-enhanced chemical vapor deposition (RF-PECVD) is reported. The effects of process parameters, including precursor type and deposition temperature, on VG synthesis were systematically investigated. The deposition temperature plays a decisive role in the formation of VGs, while the precursor primarily influences growth rate and crystallinity. VGs were synthesized using either ethylene (C 2 H 4 ) or propylene (C 3 H 6 ) as precursors, but formation does not occur at lower temperatures (e.g., 500 °C). Precursors that effectively generate carbon dimers and exhibit a higher H:C ratio are more favorable for achieving VGs with high growth rates and superior crystallinity. Furthermore, we proposed a deposition mechanism that encompasses both the growth of VGs on the Al foil surface and the diffusion of carbon atoms into the Al foil. The growth process of VGs follows three distinct stages: the formation of buffer carbon nanoislands, nucleation, and subsequent growth. X-ray photoelectron spectroscopy (XPS) revealed the chemical interactions between carbon, Al x O y , and metallic Al at the interface, resulting in a diffusion layer and an interface layer between the VG layer and the underlying Al substrate.
作者机构：
[Guo, Xueyi; Guo, XY; Liao, Hanxiao] Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China.;[Tong, Jiaxin; Tan, Pengfei; Pan, Jun; Liao, Hanxiao; He, Xiaorong; Tan, PF] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.;[Chen, Kejun] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China.;[Wang, Xin] Univ Wollongong, Fac Engn & Informat Sci, Wollongong, NSW 2500, Australia.;[Pan, Jun; Liu, Feng] Yunnan Precious Met Lab Co Ltd, Kunming 650106, Yunnan, Peoples R China.
通讯机构：
[Guo, XY ; Pan, J ; Tan, PF] C;Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China.;Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.;Yunnan Precious Met Lab Co Ltd, Kunming 650106, Yunnan, Peoples R China.
摘要：
Nickel-iron (NiFe) materials with flexible structure and component have shown all-right potency for the alkaline oxygen evolution reaction (OER) due to their low reaction barriers. However, most of NiFe catalysts suffer from inferior electrocatalytic stability induced by unfavorable Fe dissolution. Herein, the selective sulfuration of FeOOH/Ni(OH)2 (NiFe) is developed to construct a reliable Fe & horbar;S interaction in FeOOH/Ni3S2/Ni(OH)2 (NiFeS) composite and subsequently restrain the Fe dissolution, realizing durable OER stability. X-ray absorption spectroscopy and theoretical calculations demonstrate that the strong Fe & horbar;S interaction affords more electrons to metal sites, thereby stabilizing Fe sites. Meanwhile, the tailored Fe sites with shortened interatomic distance are conducive to inducing double lattice oxygen mechanism (dLOM) for further improving OER activity. Consequently, NiFeS displays a seven-fold improvement of OER stability and a decreased overpotential compared to NiFe. Moreover, the anion exchange membrane water electrolysis (AEMWE) cell using NiFeS as anode presents an impressive durability for 300 h with negligible attenuation of 0.26 mV h & horbar;1 at 1.0 A cm & horbar;2 at 60 degrees C. This work provides a new approach to conquer the Fe leakage in NiFe catalysts and enhance the catalytic stability, escorting for their industrial application.
关键词：
3D ordered gyroid substrate;Bubble behavior;High current decoupled hydrogen and oxygen evolution;High current water electrolysis
摘要：
The conversion of renewable energy sources with relatively large energy fluctuations into hydrogen represents a crucial aspect of energy storage. Nevertheless, the direct water electrolysis process is known to require excessive instantaneous energy consumption and high cost. Two-step alkaline water electrolysis is regarded as a secure and effective method of generating hydrogen from renewable energy sources when compared to direct water electrolysis. Here we propose a two-step alkaline water electrolysis using nickel–cobalt based hydroxide (Ni 0.9 Co 0.1 (OH) 2 ) as a redox mediator, and a high-performance bifunctional catalyst as gas evolution electrodes (GEE). The substrates for the GEE were prepared using 3D printing and then loaded with in-situ grown Ru-doped MoS 2 /NiFe-LDH hierarchical heterostructure catalysts (MS-NiFe-Ru-3D). The oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) of the MS-NiFe-Ru-3D catalyst can reach up to 500 mA cm −2 at 300 and 250 mV overpotentials, respectively. It can meet the requirement of high catalyst performance for two-step alkaline water electrolysis. The direct water electrolysis using the bifunctional MS-NiFe-Ru-3D catalyst only requires a voltage of 1.85 V at 500 mA cm −2 with minimal attenuation over 300 h. For the two-step alkaline water electrolysis using MS-NiFe-Ru-3D as bifunctional catalysts and Ni 0.9 Co 0.1 (OH) 2 as redox mediator, only 1.70 V and 0.27 V were required for HER and OER at 500 mA cm −2 , respectively. This work offers a promising avenue for the efficient conversion of renewable secondary energy sources into hydrogen.
The conversion of renewable energy sources with relatively large energy fluctuations into hydrogen represents a crucial aspect of energy storage. Nevertheless, the direct water electrolysis process is known to require excessive instantaneous energy consumption and high cost. Two-step alkaline water electrolysis is regarded as a secure and effective method of generating hydrogen from renewable energy sources when compared to direct water electrolysis. Here we propose a two-step alkaline water electrolysis using nickel–cobalt based hydroxide (Ni 0.9 Co 0.1 (OH) 2 ) as a redox mediator, and a high-performance bifunctional catalyst as gas evolution electrodes (GEE). The substrates for the GEE were prepared using 3D printing and then loaded with in-situ grown Ru-doped MoS 2 /NiFe-LDH hierarchical heterostructure catalysts (MS-NiFe-Ru-3D). The oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) of the MS-NiFe-Ru-3D catalyst can reach up to 500 mA cm −2 at 300 and 250 mV overpotentials, respectively. It can meet the requirement of high catalyst performance for two-step alkaline water electrolysis. The direct water electrolysis using the bifunctional MS-NiFe-Ru-3D catalyst only requires a voltage of 1.85 V at 500 mA cm −2 with minimal attenuation over 300 h. For the two-step alkaline water electrolysis using MS-NiFe-Ru-3D as bifunctional catalysts and Ni 0.9 Co 0.1 (OH) 2 as redox mediator, only 1.70 V and 0.27 V were required for HER and OER at 500 mA cm −2 , respectively. This work offers a promising avenue for the efficient conversion of renewable secondary energy sources into hydrogen.
摘要：
Physical reservoir computing (RC) mimics the brain's capacity for temporal processing by mapping inputs into high-dimensional feature spaces. This biologically inspired approach offers advantages in terms of training efficiency and real-time performance. To enhance physical RC's accuracy, nonlinear and dynamic responses are essential to distinguish complex time-series input data. Here, we present a sodium-doped perovskite memristor-based RC system that capitalizes on the synergistic effects of photovoltaic and photogating to induce nonlinear and high-dimensional dynamics. By precisely controlling the sodium doping concentration, we achieve a wide range of distinct conductance states (16 levels), enabling the system to effectively process diverse temporal patterns. We demonstrate the system’s capabilities across a range of computational tasks, achieving a 92.11 % accuracy in image recognition and a low normalized root-mean-square error (NRMSE) of 0.056 in temporal Hénon map prediction. Our findings demonstrate the potential for future development of high-performance memristor-based RC systems, particularly those capable of handling complex temporal tasks.
Physical reservoir computing (RC) mimics the brain's capacity for temporal processing by mapping inputs into high-dimensional feature spaces. This biologically inspired approach offers advantages in terms of training efficiency and real-time performance. To enhance physical RC's accuracy, nonlinear and dynamic responses are essential to distinguish complex time-series input data. Here, we present a sodium-doped perovskite memristor-based RC system that capitalizes on the synergistic effects of photovoltaic and photogating to induce nonlinear and high-dimensional dynamics. By precisely controlling the sodium doping concentration, we achieve a wide range of distinct conductance states (16 levels), enabling the system to effectively process diverse temporal patterns. We demonstrate the system’s capabilities across a range of computational tasks, achieving a 92.11 % accuracy in image recognition and a low normalized root-mean-square error (NRMSE) of 0.056 in temporal Hénon map prediction. Our findings demonstrate the potential for future development of high-performance memristor-based RC systems, particularly those capable of handling complex temporal tasks.
摘要：
Understanding the relationship between deformation behaviors and mechanisms is significant for the processing and application of metastable β titanium alloys. Here we aim to investigate and evaluate the abnormal yield strength and strain softening of a Ti-15.1Mo-2.77Nb-3.1Al-0.21Si alloy at room temperature. This alloy exhibits a high yield strength of 970 MPa, followed by the continuous stress drop behavior in the entire engineering strains (or true strains of 0.018 ∼ 0.056). Digital image correlation (DIC) reveals that the flow stress drop results from local strain softening associated with a local increase in strain rate, instead of Lüders strain. The pinning between dislocations and Si atoms as well as other interstitial atoms at and near grain boundaries is mainly responsible for the high yield strength. Subsequently, dislocations originating from grain boundaries can easily slip in a planar pattern along the {110} 〈111〉 slip systems, resulting in a continuous stress drop. In addition, both the low density of dislocations within β grains and large grain size also provide favorable conditions for dislocation slip over a long distance. This study reveals the mechanisms of both high yield strength and strain softening in the metastable β Ti alloys.
Understanding the relationship between deformation behaviors and mechanisms is significant for the processing and application of metastable β titanium alloys. Here we aim to investigate and evaluate the abnormal yield strength and strain softening of a Ti-15.1Mo-2.77Nb-3.1Al-0.21Si alloy at room temperature. This alloy exhibits a high yield strength of 970 MPa, followed by the continuous stress drop behavior in the entire engineering strains (or true strains of 0.018 ∼ 0.056). Digital image correlation (DIC) reveals that the flow stress drop results from local strain softening associated with a local increase in strain rate, instead of Lüders strain. The pinning between dislocations and Si atoms as well as other interstitial atoms at and near grain boundaries is mainly responsible for the high yield strength. Subsequently, dislocations originating from grain boundaries can easily slip in a planar pattern along the {110} 〈111〉 slip systems, resulting in a continuous stress drop. In addition, both the low density of dislocations within β grains and large grain size also provide favorable conditions for dislocation slip over a long distance. This study reveals the mechanisms of both high yield strength and strain softening in the metastable β Ti alloys.
关键词：
Ti 2 AlNb alloy;Diffusion bonding;Post heat treatment;Phase transformation;Mechanical properties
摘要：
Diffusion-bonded Ti2AlNb-based alloys commonly present a low strength compared with the deformed or aged ones. In this study, the post heat treatment including solution and aging treatments is proposed to optimize the microstructure, contributing to strength improvement and appropriate ductility sacrifice. An available method by the introduction of fine size (both 20-100 nm) and a high fraction (59.7% and 13.7%) of O and alpha(2) phases using both solution at 1000 degrees C for 1 h and aging at 750 degrees C for 5 h can result in excellent tensile strength (992 MPa and 858 MPa) at room temperature and 650 degrees C, respectively, which increases 5.3% and 44.5% than that of as-received sample. The aging treatment can contribute to lamellar O and alpha(2) grains precipitated from the B2 parent, which results in limited dislocation slip systems and slip spaces to resist plastic deformation. Moreover, the crack propagation and fracture surfaces are also comparatively analyzed to reveal the fracture behaviors in the samples with high and low strength. This study can provide a new method for the mechanical property optimization of the welded Ti2AlNb alloys.
摘要：
Herein, we report Co 3 S 4 @Zn 0.5 Co 0.5 Mn 2 O 4 (CS-ZCMO) nanocomposites formed by etching a ZnCo metal–organic framework (ZnCo-ZIF) precursor to form the Zn 0.5 Co 0.5 Mn 2 O 4 spinel structure and compositing it with Co 3 S 4 . This ZIF-derived nanosheet constitutes a reticular structure that enhances the interfacial contact with electrolyte ions and exhibits excellent electrochemical properties. With CS-ZCMO as electrode materials for a supercapacitor, the specific capacitance reached 3006 F/g at a current density of 1 A/g. The assembled CS-ZCMO//active carbon all-solid-state asymmetric supercapacitor (ASC) provided a specific capacitance of 212.3 F/g at a current density of 1 A/g and an energy density of 75.4 Wh/kg at a power density of 800 W/kg. Furthermore, the integrated circuits with ASCs demonstrated typical series and parallel connection characteristics. In addition, CS-ZCMO exhibited good electrochemical performance for energy-efficient hydrolysis, achieving a voltage of 1.324 V at 10 mA/cm 2 in KOH + urea solutions. The self-powered electrocatalytic system was constructed using charged ASCs powered by a commercial solar panel and a hydrolysis electrolytic bath.
