期刊：
Results in Surfaces and Interfaces,2023年12:100130 ISSN：2666-8459
通讯作者：
Weiguo Mao<&wdkj&>Cuiying Dai
作者机构：
[Xixing Deng; Weiguo Mao; Zhangji Luo; Wenjie Ye; Cuiying Dai] College of Materials Science and Engineering, Changsha University & Science and Technology, Hunan, 410114, China;Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, 410073, China;Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha 410114, Hunan, China;[Xizhi Fan] College of Materials Science and Engineering, Changsha University & Science and Technology, Hunan, 410114, China<&wdkj&>Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, 410073, China<&wdkj&>Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha 410114, Hunan, China
通讯机构：
[Weiguo Mao; Cuiying Dai] C;College of Materials Science and Engineering, Changsha University & Science and Technology, Hunan, 410114, China
摘要：
The high-temperature mechanical properties and failure mechanisms of Si, BSAS and Yb2SiO5 ceramic materials are important for environmental barrier coatings. The Si coating, BSAS coating and Yb2SiO5 coating were prepared by the atmospheric plasma spray (APS) technique. The elastic modulus, fracture strength and fracture strain are determined by three-point bending combined with the digital image correlation (DIC) method. The results show that as the test temperature increases from 25 °C to 1000 °C, the elastic modulus of the Si coating and Yb2SiO5 coating decreases while the elastic modulus of the BSAS coating increases. And the fracture strength and fracture strain of the Si coating, BSAS coating and Yb2SiO5 coating increase. The elastic modulus is related to the interatomic distance and bonding strength of atoms. The fracture strength and fracture strain increase with the densification of the coating.
摘要：
Lithium-ion capacitors (LICs) merged the energy characteristic of lithium-ion batteries and power characteristic of supercapacitors have aroused intensive attention. Nevertheless, the low capacity of capacitor-type cathode confines the development of LICs. Herein, an economic and efficient approach is developed to fabricate nitrogen and phosphorus co-doped hierarchical porous carbon (NP-HPC) by carbonizing cross-linked phytic acid and poly pyrrole/aniline precursor (PACP), in which phytic acid acts not only as a chemical crosslinker to regulate the precursor structure, but also a phosphorus source for dopant, thus providing more active sites for Li storage and enhancing structural stability. As-prepared NP-HPC cathode with enlarged specific surface area (-2750 m2 g-1) and more micropores (-1.410 nm) delivered a high specific capacity of 89 mAh g-1, with an ultrahigh capacity retention of 88.6% after 10000 cycles at 1.0 A g-1. DFT calculations demonstrated the co-dopant of N and P atoms synergistically improve the Li+ adsorption energy and electrochemical stability. More importantly, the assembled dual carbon LICs employing homologous NP-HPC and N, P co-doped spherical carbon (NP-SC) electrodes from the same precursor exhibit a maximum energy density of 121 Wh kg- 1 at a power density of 92 W kg- 1, with long-term cycling stability over 3000 cycles at 1 A g-1 with 80.2% retention.
摘要：
Electrolyte regulation plays its critical role in addressing the reversibility issue of metallic Zn anode towards high-performance aqueous zinc ion batteries. In view of the flourish electrolyte additive approach, the review is organized to discuss the influence of electrolyte additive on the electrolyte-Zn chemistry for the representative zinc electrolytes. Accordingly, the effects of electrolyte additives on the fundamental physicochemical properties of electrolytes, Zn surface, and Zn deposition are discussed and summarized. Based on the revealed roles of additives in interface reaction across current literature, we further provide outlook and perspective on current issues of the additive approach and potential directions.
摘要：
SnO2/Gr composite as anode material for lithium-ion batteries was synthesized by an acoustic-chemical method followed by an annealing treatment. The composite exhibits high crystallinity and purity, and the weight ratio of SnO2 is controllable. Benefit from the compound effect between material components, the SnO2/Gr anodes give notable reaction kinetics and cycling stability. The specific capacity of the composite with 27.4 wt% SnO2 re-mains 649.9 mA h g � 1 after 170 cycles at 200 mA g � 1. The strain field features in the symmetrical SnO2/Gr electrodes were in-situ measured during electrochemical cycles by digital image correlation technique. The distribution and variation characterizations of diffusion induced stress in the symmetrical SnO2/Gr electrodes were obtained by using mechano-electrochemical coupling constitutive equation. Furthermore, the contributions of the electrochemical and mechanical stress parts to the plane stress in the symmetrical SnO2/Gr electrodes also be discussed, respectively. The results and analytical method are critical for further revealing the failure mechanism and optimizing architecture of the SnO2/Gr electrodes for lithium-ion batteries.
作者机构：
[Yuan, Du; Liu, Xiangjie; Yang, Xiaotong; Li, Xin] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, 960,2nd Sect,Wanjiali RD S, Changsha 410004, Hunan, Peoples R China.;[Zhang, Yizhou; Zhang, Xuan; Lu, Jingqi] Nanjing Univ Informat Sci & Technol, Inst Adv Mat & Flexible Elect IAMFE, Sch Chem & Mat Sci, Nanjing 210044, Peoples R China.
通讯机构：
[Prof. Du Yuan; Prof. Du Yuan Prof. Du Yuan Prof. Du Yuan] C;[Prof. Yizhou Zhang; Prof. Yizhou Zhang Prof. Yizhou Zhang Prof. Yizhou Zhang] S;School of Chemistry and Materials Science, Institute of Advanced Materials and Flexible Electronics (IAMFE), Nanjing University of Information Science and Technology, Nanjing, 210044 P. R. China<&wdkj&>College of Materials Science and Engineering, Changsha University of Science and Technology, 960, 2nd Section, Wanjiali RD (S), Changsha, Hunan, 410004 P. R. China
关键词：
gel;electrolyte;water;physiochemical;zinc ion battery
摘要：
Although water metalloid pollution is widely studied, the effect of the combined pollution of organic matter and metalloids in mining water and, especially, the possible interaction mechanisms between metalloids and flotation reagents, are both poorly understood. Existence of mixed pollution of metalloids and organic compounds tends to cause more serious harm to natural organisms. In this study, a synergistic removal of arsenite (As(III)) and butyl xanthate (Bx) in an advanced oxidation system was reported using biochar-based catalyst loaded with nano-zero-valent iron from an inexpensive iron source (iron slag) to activate peroxodisulfate. The removal efficiencies were improved by 30 % in the co-existence of As(III) and Bx compared to those of the single pollutant. The theoretical calculations, especially frontier molecular orbital theory, revealed the generation of [AsO2-OH]center dot-by the com-bination of As(II) with center dot OH. This [AsO2-OH]center dot-participated in the oxidative degradation of Bx with high activity and combined with the sulfur falling off Bx after the reaction to form a novel Fe-As-S complex as indicated by X-ray absorption +fine structure analysis. Overall, this study reports the generation of low-valent arsenic active substances of [AsO2-OH]center dot-and their effect on the removal of organic pollution containing S atoms in advanced oxidation systems under typical mining water conditions with the coexistence of As(III) and expands the un-derstanding and application of traditional free radicals.
摘要：
Both two-dimensional (2D) graphene (G) and layered double hydroxides (LDHs) nanomaterials can form excellent heterojunction structures and have been widely implemented to deal with energy storage. However, they often face general aggregation issues during application. Therefore, to fully exploit the advantages of each material, G and LDHs could be combined to form a novel nanocomposite material. In this review, we summarize the electrochemical energy storage and conversion (EESC) systems based on graphene/LDH (GLDH) composites, including their application in general supercapacitors (SCs), flexible supercapacitors (FSCs), rechargeable batteries, mental air cells, and oxygen evolution reactions (OER). Furthermore, the unresolved issues and possible improvements in GLDH were highlighted.
通讯机构：
[Zhang, LC ] E;[Zhou, SF ] J;Jinan Univ, Inst Adv Wear & Corros Resistance & Funct Mat, Guangzhou 510632, Peoples R China.;Chongqing Univ, state Key Lab Mech Transmiss, Chongqing 400044, Peoples R China.;Edith Cowan Univ, Ctr Adv Mat & Mfg, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia.
关键词：
Titanium alloy;Laser powder bed fusion;Deformation twins;Heterostructure;Mechanical behavior
摘要：
Limited slip systems of & alpha; structure always play a major role in hindering strength-ductility synergy improvement of titanium (Ti) alloys. To overcome the strength-ductility trade-off of Ti alloys, heterostructure is introduced into Ti6Al4V-xCu (x = 0, 1, 3, 5 wt.%) alloys produced by laser powder bed fusion (LPBF), and the formation mechanism and deformation behavior of heterostructures were investigated. The results showed that the monolithic & alpha;' in the LPBF-produced Ti6Al4V-xCu (wt%) alloys is decomposed into dual & alpha; and & alpha;" after heat treatment at 600-900 degrees C through & alpha;' & RARR; & alpha; + Ti2Cu & RARR; matastable phase & RARR; & alpha; + & alpha;". The multistage transformation of & alpha;' to & alpha; and & alpha;" is driven by thermal activation (temperature > 800 degrees C), Cu addition and rapid cooling of water quenching. The heterostructure with & alpha; and & alpha;" in the LPBF-produced Ti6Al4V-5Cu alloy after heat treatment at 800 degrees C results in high tensile strength (-1.3 GPa) and large elongation (-15%). The enhanced strength-ductility synergy is attributed to the decomposition of brittle & alpha;' and Ti2Cu, as well the soft-hard heterostructure of & alpha;" and & alpha;. Moreover, the deformation twins (DTs) in & alpha;" and the heterogeneous interfaces of & alpha; and & alpha;" can also improve the strength and ductility of the LPBF-produced Ti6Al4V-xCu alloys. These findings elucidate the influence of heterostructure (& alpha; and & alpha;") on strength and ductility, which is helpful for designing Ti alloys with excellent mechanical properties.
作者机构：
[Zou, Guoqiang; Tao, Shusheng; Deng, Wentao; Hu, Xinyu; Hu, Zhiyu; Wu, Jiae; Hou, Hongshuai; Ji, Xiaobo; Cao, Ziwei; Song, Zirui] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China.;[Huang, Zhaodong] City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, 83 Tat Chee Ave, Hong Kong 999077, Peoples R China.;[Song, Bai] Dongying Cospowers Technol Ltd Co, Dongying 257091, Peoples R China.;[Li, Fengrong] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China.
通讯机构：
[Zou, GQ ] C;Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China.
关键词：
Aqueous Electrolyte;Co-Solvent;Hydrogen Bond Network;Supercapacitor;Zinc
摘要：
High‐voltage aqueous rechargeable energy storage devices with safety and high specific energy are hopeful candidates for the future energy storage system. However, the electrochemical stability window of aqueous electrolytes is a great challenge. Herein, inspired by density functional theory (DFT), polyethylene glycol (PEG) can interact strongly with water molecules, effectively reconstructing the hydrogen bond network. In addition, N, N‐dimethylformamide (DMF) can coordinate with Zn2+, assisting in the rapid desolvation of Zn2+ and stable plating/stripping process. Remarkably, by introducing PEG400 and DMF as co‐solvents into the electrolyte, a wide electrochemical window of 4.27 V can be achieved. The shift in spectra indicate the transformation in the number and strength of hydrogen bonds, verifying the reconstruction of hydrogen bond network, which can largely inhibit the activity of water molecule, according well with the molecular dynamics simulations (MD) and online electrochemical mass spectroscopy (OEMS). Based on this electrolyte, symmetric Zn cells survived up to 5000 h at 1 mA cm−2, and high voltage aqueous zinc ion supercapacitors assembled with Zn anode and activated carbon cathode achieved 800 cycles at 0.1A g‐1. This work provides a feasible approach for constructing high‐voltage alkali metal ion supercapacitors through reconstruction strategy of hydrogen bond network.
作者机构：
[Mirolo, Marta; Martens, Isaac; Leake, Steven J; Drnec, Jakub; Zatterin, Edoardo; Vostrov, Nikita] ESRF - The European Synchrotron, 71 Avenue des Martyrs, 38000, Grenoble, France;[Zhu, Xiaobo] College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, 410114, China;[Wang, Lianzhou] Nanomaterials Centre, School of Chemical Engineering, and Australian Institute of Bioengineering and Nanotechnology, University of Queensland, Brisbane, QLD, 4072, Australia;[Richard, Marie-Ingrid] ESRF - The European Synchrotron, 71 Avenue des Martyrs, 38000, Grenoble, France. mrichard@esrf.fr;[Richard, Marie-Ingrid] Université Grenoble Alpes, CEA Grenoble, IRIG, MEM, NRX, 17 rue des Martyrs, 38000, Grenoble, France. mrichard@esrf.fr
通讯机构：
[Marie-Ingrid Richard; Tobias U. Schulli] E;ESRF - The European Synchrotron, 71 Avenue des Martyrs, 38000, Grenoble, France.;Université Grenoble Alpes, CEA Grenoble, IRIG, MEM, NRX, 17 rue des Martyrs, 38000, Grenoble, France.
摘要：
Lithiation dynamics and phase transition mechanisms in most battery cathode materials remain poorly understood, because of the challenge in differentiating inter- and intra-particle heterogeneity. In this work, the structural evolution inside Li1−xMn1.5Ni0.5O4 single crystals during electrochemical delithiation is directly resolved with operando X-ray nanodiffraction microscopy. Metastable domains of solid-solution intermediates do not appear associated with the reaction front between the lithiated and delithiated phases, as predicted by current phase transition theory. Instead, unusually persistent strain gradients inside the single crystals suggest that the shape and size of solid solution domains are instead templated by lattice defects, which guide the entire delithiation process. Morphology, strain distributions, and tilt boundaries reveal that the (Ni2+/Ni3+) and (Ni3+/Ni4+) phase transitions proceed through different mechanisms, offering solutions for reducing structural degradation in high voltage spinel active materials towards commercially useful durability. Dynamic lattice domain reorientation during cycling are found to be the cause for formation of permanent tilt boundaries with their angular deviation increasing during continuous cycling. Lithiation dynamics and phase transition mechanisms in battery materials remain poorly understood. Here authors use operando X-ray nanodiffraction microscopy to reveal how domains relate to defects and how cycling affects the lattice domain reorientation in LiMn1.5Ni0.5O4 single crystals.
作者机构：
[Zafar, Zainab; Liu, Xiaochun; Wu, Xiang; Liu, Yujing; Zhang, Jiaxuan] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Inst Met, Changsha 410114, Peoples R China.;[Wang, Richu] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.;[Qian, Lihua] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China.;[Sun, Lixin] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China.
通讯机构：
[Xiaochun Liu] I;Institute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China
作者机构：
[Chen, Zhaoyong; Bai, Maohui] Changsha Univ Sci & Technol, Inst New Energy & Power Battery, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Bai, Maohui; Hong, Bo; Lai, Yanqing] Cent South Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.;[Yuan, Kai; Zhang, Kun] Northwestern Polytech Univ, Ctr Nano Energy Mat, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China.
通讯机构：
[Maohui Bai] C;College of Materials Science and Engineering, Institute of New Energy and Power Battery, Changsha University of Science and Technology, Changsha 410004, PR China<&wdkj&>School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, PR China
通讯机构：
[Jincheng Fan; Zisheng Chao] C;College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, Hunan 410114, China
关键词：
3D Co3S4 nanowires;Electrochemical performances;Supercapacitor;Urea electrolysis
期刊：
Construction and Building Materials,2022年359:129456 ISSN：0950-0618
通讯作者：
Fu, Hongyuan(fuhy001@163.com)
作者机构：
[Zha, Huanyi; Fu, Hongyuan] Changsha Univ Sci & Technol, Sch Civil Engn, Changsha 410114, Peoples R China.;[Yang, Jin; Wang, Hualei; Jia, Chuankun; Fu, Hongyuan; Chen, Caiying] Changsha Univ Sci & Technol, Sch Traff & Transportat Engn, Changsha 410114, Peoples R China.;[Yuan, Du; Jia, Chuankun; Zhu, Xiaobo] Changsha Univ Sci & Technol, Inst Energy Storage Technol, Changsha 410114, Peoples R China.;[Yuan, Du; Zhu, Xiaobo] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China.
通讯机构：
[Hongyuan Fu; Chuankun Jia] S;[Xiaobo Zhu] I;Institute of Energy Storage Technology, Changsha University of Science and Technology, Changsha 410114, China<&wdkj&>College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, China<&wdkj&>School of Civil Engineering, Changsha University of Science and Technology, Changsha 410114, China<&wdkj&>School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China<&wdkj&>School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China<&wdkj&>Institute of Energy Storage Technology, Changsha University of Science and Technology, Changsha 410114, China
通讯机构：
[Xiaochun Liu] I;[Yongfeng Shen] K;Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China<&wdkj&>Institute of Metals, College of Materials Science and Engineering, Changsha University Of Science and Technology, Changsha 410114, China
关键词：
Cantor alloy;Cyclic deformation;Concentration wave;EDS maps
摘要：
High entropy alloys exhibit excellent combination of mechanical properties because of the unique composition fluctuations, termed as 'concentration wave'. The concentration wave was closely related to multiple aspects, including the fluctuation of local strain energy, local atomic environment, electronegativity, etc. Here we report for the first time that the amplitude of the concentration wave can be mechanically tailored under cyclic deformation in a well-known Cantor alloy. Atomic-scale energy-dispersive X-ray spectroscopy (EDS) mapping reveals that cyclic deformation may dynamically induce the clustering of solute atoms with a size of 1-3 nm, thus resulting in a higher concentration wave amplitude. The concentration wave promotes strong interactions between dislocations and local solute clusters. Aside from the typical Taylor strengthening contribution due to the presence of isolated dislocations, the strength enhancement from the mechanically induced composition fluctuations was quantified to be as high as similar to 70 MPa, about one-third of the yield strength of the alloy without pre-deformation. This opens up a novel strategy of designing high strength alloys by tailoring solute configurations. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
