作者机构:
[Li, Tao; Zhu, Huali; Bai, Maohui; Chen, Zhaoyong] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Li, Tao; Zhu, Huali; Chen, Zhaoyong; Bai, Maohui] Changsha Univ Sci & Technol, Inst New Energy & Power Battery, Changsha 410004, Peoples R China.;[Huang, Zimo; Bai, Maohui; Hu, Lina; Hong, Bo] Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China.;[Huang, Zimo] Griffith Univ, Sch Environm & Sci, Queensland Micro & Nanotechnol Ctr, Nathan, Qld 4111, Australia.
通讯机构:
[Bai, MH; Chen, ZY ; Hong, B ] C;Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China.
关键词:
Poly(methyl methacrylate) oligomer;Li metal anode;Air stability;Gel polymer electrolyte
摘要:
Lithium (Li) metal anode has been an indispensable electrode material in the development of the future battery system, especially in the pursuit of energy density of the solid state battery. However, the poor air stability and dendrite problems are stumbling blocks to the practical application of Li metal anode. Herein, we design the poly(methyl methacrylate) (PMMA) oligomer coating layer for the surface of Li metal anode (Li-PMMA). The Li-PMMA anode can obtain hydrophobic oxygen resistance ability and maintain air stability for 48h in the environment of 70% relative humidity. When applied to the liquid battery, the PMMA oligomer can open the double bond by the catalysis of Li+ and repolymerize into the PMMA gel polymer electrolyte (GPE). As a result, the cathode and anode are cohered together by GPE to become an in-situ GPE battery. The GPE displays high ionic conductivity (7.92 mS cm-1) and perfect interfacial contact with various electrodes. The newly designed in-situ GPE is employed to Li||Li symmetric battery without separator, which can run up to 2000 h with the overpotential of only 2.8 mV. Applications of the in-situ GPE in Li-S battery and 5000mAh LiNi0.5Co0.2Mn0.3O2/Li pouch cell both obtain excellent electrochemical performance. Our strategy may provide a versatile and practical approach to promote the large-scale application for solid state Li metal batteries.
摘要:
Single-atom catalysts (SACs) containing noble metals have been largely explored for various catalytic reactions and demonstrated high activity and chemical stability but are rarely used for electrocatalytic nitrate reduction to ammonia (NO3-RA) because of their strong tendency towards hydrogen evolution reaction (HER). Herein, we developed the N, O trans-coordination strategy to inhibit the HER of carbon nanotube-based Ag SACs (Ag1/ NOCNT) catalyst, thus improving the NH3 production. The Ag1/NOCNT exhibits a record-high ammonia yield rate (YRNH3) of 90 mol h-1 gAg-1, more than two folds of the best-reported SACs using carbon supports, as well as high Faradaic efficiency (FENH3) of 97.9% and optimal electrochemical stability. These excellent performances attribute to the novel trans AgN2O2 configuration, suppressing the HER, optimizing the adsorption of intermediates and facilitating the potential-determining step in NO3- RA. The corresponding plasma-driven nitrogen oxidation and NOx- reduction coupling system presented high YRNH3 of -1.3 mol h-1 g-1 (-41.5 mol h-1 gAg-1) and FENH3 of 85.2%, demonstrating high feasibility for sustainable green NH3 synthesis over specially designed catalytic materials under ambient conditions.
期刊:
Science of The Total Environment,2023年857(Pt 2):159462 ISSN:0048-9697
通讯作者:
Sha Wu<&wdkj&>Hailong Li
作者机构:
[Yang, Min; Chen, Hong; Wang, Hong; Wu, Sha; Yang, Enzhe; Chen, Jing] Changsha Univ Sci & Technol, Sch Hydraul & Environm Engn, Key Lab Dongting Lake Aquat Ecoenvironm Control &, Changsha 410004, Peoples R China.;[Chen, Hong] Grad Sch Engn Tohoku Univ, Aoba Ward, Dept Civil & Environm Engn, Lab Environm Protect Engn, 6 6 06 Aza Aoba, Sendai, Miyagi 9808579, Japan.;[Liu, Ke] China Machinery Int Engn Design & Res Inst Co Ltd, Changsha 410007, Peoples R China.;[Gu, Yanling] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410004, Peoples R China.;[Wang, Dongbo] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.
通讯机构:
[Sha Wu] K;[Hailong Li] S;Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410004, China<&wdkj&>School of Energy Science and Engineering, Central South University, Changsha 410083, China
摘要:
The novel biological nitrogen removal process has been extensively studied for its high nitrogen removal efficiency, energy efficiency, and greenness. A successful novel biological nitrogen removal process has a stable microecological equilibrium and benign interactions between the various functional bacteria. However, changes in the external environment can easily disrupt the dynamic balance of the microecology and affect the activity of functional bacteria in the novel biological nitrogen removal process. Therefore, this review focuses on the microecology in existing the novel biological nitrogen removal process, including the growth characteristics of functional microorganisms and their interactions, together with the effects of different influencing factors on the evolution of microbial communities. This provides ideas for achieving a stable dynamic balance of the microecology in a novel biological nitrogen removal process. Furthermore, to investigate deeply the mechanisms of microbial interactions in novel biological nitrogen removal process, this review also focuses on the influence of quorum sensing (QS) systems on nitrogen removal microbes, regulated by which bacteria secrete acyl homoserine lactones (AHLs) as signaling molecules to regulate microbial ecology in the novel biological nitrogen removal process. However, the mechanisms of action of AHLs on the regulation of functional bacteria have not been fully determined and the composition of QS system circuits requires further investigation. Meanwhile, it is necessary to further apply molecular analysis techniques and the theory of systems ecology in the future to enhance the exploration of microbial species and ecological niches, providing a deeper scientific basis for the development of a novel biological nitrogen removal process.
期刊:
Journal of the European Ceramic Society,2023年43(11):4636-4644 ISSN:0955-2219
通讯作者:
Feng, ZR
作者机构:
[Peng, Ke; Yi, Maozhong; Feng, Zhirong; Xie, Aolin; Wang, Xiaodong; Zhang, Bei; Ge, Yicheng; Xu, Ping] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.;[Zhou, Zhe] Changsha Univ & Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构:
[Feng, ZR ] C;Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.
关键词:
C;C composites;SiC nanowire-toughened SiC coating;Double protective layers;Fracture toughness;Oxidation resistance
摘要:
To maintain the thermal stability of SiC nanowires during SiC coating fabrication process, carbon and SiC double protective layers were covered on the surface of nanowires. And SiC nanowires with double protective layers toughened SiC coating were prepared by pack cementation. The results showed that after introducing the SiC nanowires with double protective layers, the fracture toughness of the SiC coating was increased by 88.4 %. The coating protected C/C for 175 h with a mass loss of 3.67 %, and after 51 thermal shock cycles, the mass losses of the oxidized coating were 3.96 %. The double protective layers are beneficial to improve the thermal stability of nanowires, leading to good fracture toughness and thermal shock resistance of SiC coating. SiC nanowires consume the energy of crack propagation by fracture, pullout and bridging, leading to an increase in fracture toughness.
关键词:
Aluminum ion batteries;ZnSe;SnSe 2 cathode;Heterojunction;Hollow microcubes;Electrochemical performance;Reaction mechanism
摘要:
Advances in cathode material design and understanding of intercalation mechanisms are necessary to improve the overall performance of aluminum ion batteries. Therefore, we designed ZnSe/SnSe2 hollow microcubes with heterojunction structure as a cathode material for aluminum ion batteries. ZnSe/ SnSe2 hollow microcubes with an average size of about 1.4 lm were prepared by selenization of ZnSn (OH)6 microcubes successfully. The shell thickness of ZnSe/SnSe2 hollow microcubes is about 250 nm. On one hand, the hollow cubic structure can effectively alleviate the volume effect, provide shorter ion diffusion paths, and increase the contact area with the electrolyte. On the other hand, ZnSe/SnSe2 heterojunction structure can establish a built-in electric field to facilitate ion transport. The synergistic effect of the two leads to the improved electrochemical performance of ZnSe/SnSe2 as the cathode of aluminum ion batteries. The material delivered a reversible capacity of 124 mAh/g after 150 cycles at a current density of 100 mA/g. Meanwhile, coulombic efficiency remained above 98% in almost all cycles. In addition, the electrochemical reaction mechanism and kinetic process of Al3+ and ZnSe/SnSe2 were studied.(c) 2023 Elsevier Inc. All rights reserved.
作者机构:
[郭金玉; 杨现锋; 刘鹏; 倪振涛] College of materials science and engineering, Changsha University of Science & Technology, Changsha, 410114, China;[李远兵; 杨现锋] The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan, 430080, China
通讯机构:
[Yang, X.] C;College of materials science and engineering, China
作者机构:
[周哲; 廖桓毅; 金鑫] School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, 410114, China;[夏大旺; 李智] School of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105, China
通讯机构:
[Zhou, Z.] S;School of Materials Science and Engineering, China
作者机构:
[Zhang, Haitao] Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China.;[Yuan, Du] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Zhao, Jin] Nanjing Univ Posts & Telecommun, Inst Adv Mat IAM, Key Lab Organ Elect & Informat Displays KLOEID, Nanjing 210023, Peoples R China.;[Zhao, Jin] Nanjing Univ Posts & Telecommun, Inst Adv Mat IAM, Jiangsu Key Lab Biosensors, Nanjing 210023, Peoples R China.;[Ji, Xiaoyan] Lulea Univ Technol, Div Energy Sci, Energy Engn, S-97187 Lulea, Sweden.
通讯机构:
[Prof. Haitao Zhang; Prof. Haitao Zhang Prof. Haitao Zhang Prof. Haitao Zhang] B;[Prof. Du Yuan; Prof. Du Yuan Prof. Du Yuan Prof. Du Yuan] C;[Prof. Jin Zhao; Prof. Jin Zhao Prof. Jin Zhao Prof. Jin Zhao] K;[Prof. Xiaoyan Ji; Prof. Xiaoyan Ji Prof. Xiaoyan Ji Prof. Xiaoyan Ji] E;[Prof. Yi-Zhou Zhang; Prof. Yi-Zhou Zhang Prof. Yi-Zhou Zhang Prof. Yi-Zhou Zhang] S
摘要:
This Special Collection highlights the latest developments in the field of gel electrolytes. In this Editorial, guest editors Haitao Zhang, Du Yuan, Jin Zhao, Xiaoyan Ji, and Yi‐Zhou Zhang briefly introduced the research focusing on chemistry and applications of gel electrolytes in this special collection.
作者机构:
[Weng, Zheng; Zhou, Jiang; Li, Jiaqi; Chen, Gen; Qin, Zuosu; Chen, G; Zhang, Ning; Zhou, J] Cent South Univ, Sch Mat Sci & Engn, Key Lab Elect Packaging & Adv Funct Mat Hunan Prov, Changsha 410083, Peoples R China.;[Zhang, Ying; Liu, Xiaohe] Zhengzhou Univ, Zhongyuan Crit Met Lab, Zhengzhou 450001, Peoples R China.;[Jia, Chuankun] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China.
通讯机构:
[Chen, G; Zhou, J ] C;Cent South Univ, Sch Mat Sci & Engn, Key Lab Elect Packaging & Adv Funct Mat Hunan Prov, Changsha 410083, Peoples R China.
关键词:
metal-organic frameworks;lithium metal battery;separator;electrolyte
摘要:
In view of novel materials in the field of lithium metal batteries (LMBs), metal-organic frameworks (MOFs) have attracted extensive research interest owing to their controllable pore size, unsaturated metal sites and multifunctional organic groups. A variety of MOFs have been elaborately calculated and synthesized to be applied as separator coating, electrolyte modulators and solid-state electrolyte fillers in LMBs. In this mini-review, we summarize the mechanism of MOFs to limit the migration of anions, improve the Li-ion transference number and prolong the lifespan of LMBs. Suitable pore structure of MOFs can physically restrict the movement of Li+. Unsaturated metal sites can adsorb anions by electrostatic interaction. In addition, multifunctional organic functional groups that limit the migration of anions are discussed. Finally, the key challenges and perspectives in the development direction of MOFs-based separators and electrolytes are further elaborated.
摘要:
SiC/SiBCN composites were prepared via polymer infiltration and pyrolysis technique (PIP) and the influence of the interfacial microstructure on the mechanical properties of the composites was investigated. In this paper, an amorphous SiOC layer was observed at the fiber-matrix interface for the first time. Formation of the SiOC layer stems from SiO gas formed inside the ceramic matrix may diffused towards the interface and reacted with the carbon-rich layer of SiC fibers to form Si atom. Si atom dissolved in the O-C molecular network to form a 100 nm chemical bonding SiOC layer, which caused the SiC fibers to pull out in a whole bundle and the pull-out length was short, leading to a composite flexural strength of only 143 +/- 30 MPa. By introducing SiC coating, SiC fibers were effectively protected from chemical reactions, and the coating acted as a barrier to the diffusion and migration of the matrix elements to the interface and weakened the interfacial bonding strength (IFBs), in which IFBs decreased from 266 +/- 19 MPa to 170 +/- 10 MPa. Hence, the flexural strength of composites increased up from 143 +/- 30 MPa to 388 +/- 16 MPa.(c) 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
期刊:
Journal of Electroanalytical Chemistry,2023年928:117063 ISSN:1572-6657
通讯作者:
Daifei Liu
作者机构:
[Chen, Qiaoyun; Liu, Daifei; Tan, Lei; Huang, Xing] Changsha Univ Sci & Technol, Sch Energy & Power Engn, Changsha 410114, Hunan, Peoples R China.;[Chen, Peng; Zou, Kangyu; Li, Lingjun] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构:
[Daifei Liu] S;School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410114, Hunan, China
关键词:
Li metal anode;Li dendrites;Side reactions;LiCl protective layer
摘要:
Li metal anode is a potential candidate for high-energy-density batteries. However, Li dendrites and the side reactions bring challenges to the application of Li metal anode. Herein, a LiCl protective layer is fabricated on the surface of Li metal anode by a facile chemistry process. Attributing to the low Li ion diffusion energy barrier and high stability of LiCl, the Li metal with LiCl layer (LiCl@Li) shows a dendrite-free deposition, forming a robust LiF-riched SEI and effectively suppresses the interfacial side reactions during cycling. The LiCl@Li anode sustains repeated plating/stripping over 500 h with flat overpotential and shows 2.8 times longer lifetime than bare Li anode at a current density of 2 mA cm-2. We believe this work would inspire more opportunities in Li surface engineering and accelerate the development of high-reliability Li metal anode.
作者:
Zhao, Z. B.*;Zhang, B. H.;Wang, Q. J.;Sun, H.;Yang, J. X.;...
期刊:
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2023年54(7):2890-2902 ISSN:1073-5623
通讯作者:
Zhao, Z. B.;Wang, QJ;Liu, YJ
作者机构:
[Zhao, Z. B.; Wang, QJ; Yang, J. X.; Liu, J. R.; Wang, Q. J.; Sun, H.; Yang, R.; Zhang, B. H.] Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China.;[Zhang, B. H.] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China.;[Liu, Y. J.; Liu, YJ] Changsha Univ Sci & Technol, Inst Met, Coll Mat Sci & Engn, 960 Wanjiali RD S, Changsha 410004, Peoples R China.
通讯机构:
[Zhao, ZB; Wang, QJ ; Liu, YJ ] C;Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China.;Changsha Univ Sci & Technol, Inst Met, Coll Mat Sci & Engn, 960 Wanjiali RD S, Changsha 410004, Peoples R China.
摘要:
Regions with sharp local texture, called macrozones, are often found in titanium alloy forgings and can reduce fatigue performances. This study observed the evolution of macrozones during hot compression of the Ti-5Al-2Sn-2Zr-4Mo-4Cr alloy in the alpha + beta field. The results show that the macrozones are primarily related to the prior beta grains and remained stable during compression. We analyzed the evolution of the beta phase inter-structure at various deformation parameters, discussed the role of the primary alpha grains on the recrystallization of beta grains. From studying the microstructural characteristics of the material, the effect of deformation parameters on the microstructure evolution was discussed by combining the effect of the primary alpha grains. New insights to identify the stability of the macrozones are revealed.
通讯机构:
[Liu, XC ] C;Changsha Univ Sci & Technol, Inst Met, Coll Mat Sci & Engn, Changsha, Peoples R China.
关键词:
Chemical fluctuations;Medium-range orders;Dislocations;CrCoNi medium entropy alloy
摘要:
Equiatomic multi-principal element alloys manifest unique mechanical properties derived from the single-phase solid solutions with compositional disorders. Recently discovered medium-range orders (MROs) with a size of 1-5 nm in CrCoNi medium entropy alloy acclaimed measurable impact on mechan-ical properties, which, however has been questioned by density functional theory calculations. Here we report that the formation of MROs is accompanied by the redistribution of constituent elements, and the subtle chemical composition fluctuations could by directly probed and quantified by using a state-of-the-art aberration-corrected transmission electron microscope. The presence of such MROs contributes to an appreciable increase in yield strength (-40 MPa) with a higher work hardening rate, originating from the strong dislocation interactions with MROs at the incipient plastic deformation. These findings demon-strate that MROs have a significant impact on reducing the mean free path of full/partial dislocations along a specific slipping plane, offering a new avenue for strengthening of equiatomic element alloys by tuning local composition and atomic configurations. CO 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
作者:
Lu, Y. J.;Liu, X. C.;Liu, Y. J.;Wu, X.;Jiang, Y.;...
期刊:
Composites Part A: Applied Science and Manufacturing,2023年164:107278 ISSN:1359-835X
通讯作者:
X.C. Liu<&wdkj&>Y.J. Liu<&wdkj&>L.C. Zhang
作者机构:
[Lu, Y. J.] Fujian Normal Univ, Coll Optoelect & Elect Engn, Fuzhou 350117, Peoples R China.;[Liu, Y. J.; Wu, X.; Liu, X. C.] Changsha Univ Sci & Technol, Inst Met, Coll Mat Sci & Engn, Changsha 410114, Peoples R China.;[Zhang, L. C.] Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia.;[Lu, Y. J.; Lin, J. X.] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Peoples R China.;[Liu, Z.] Nanchang Hangkong Univ, Sch Aeronaut Mfg Engn, Nanchang 330063, Jiangxi, Peoples R China.
通讯机构:
[X.C. Liu; Y.J. Liu] I;[L.C. Zhang] S;Institute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China<&wdkj&>Institute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China<&wdkj&>School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia
关键词:
3D Printing;Biocomposite;Corrosion;Metal-matrix composites
期刊:
Journal of Materials Research and Technology,2023年24:9356-9368 ISSN:2238-7854
作者机构:
[Dong, Hongrui; Zhao, Shiteng] School of Materials Science and Engineering, Beihang University, Beijing 100191, China;[Li, Xiaoqiang; Li, Yong; Meng, Bao] School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China;[Wang, Haibo] School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100144, China;[Liu, Xiaochun] Institute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China;[Du, Kai] School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
关键词:
Electrically-assisted forming;AA7075-T6;Precipitate;Constitutive model
摘要:
It has been known for decades that the formability of metal sheets can be improved effectively by electrically-assisted (EA) forming. However, it remains controversial as to the detailed mechanisms and the manifestation of electrical effects can vary in different materials. In this paper, the EA flow behavior and mechanism of a precipitation hardened AA7075-T6 were studied. The term “electric current density sensitivity” (ECDS) was introduced to describe the athermal effect. The results show that Joule heating is the main influence factor, while the athermal effect varies with the electric-thermal parameters. Here, we report an anomalous negative electric current sensitivity in AA7075-T6, i.e. the flow stress increases with current density under the same temperature and strain rate when the temperature is ≤150 °C and strain rate is ≥0.005/s. The above phenomena are attributed to the local Joule heating and promoted atom diffusion under the action of the current, leading to the dissolution of GPZ, the formation of fine precipitate and Cr segregation-induced vacancies. Further, an extended dislocation density based constitutive model was proposed to cover the ECDS and softening effect, which could predict the flow behavior of 7075-T6 under EA forming, including the negative electric current sensitivity. The above work provides a viable method to simultaneously control both the shape and performance of the metal part. Meanwhile, the corresponding mechanism shed new light into the understanding of electroplasticity.