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Reinforced Lewis covalent bond by twinborn nitride heterostructure for lithium-sulfur batteries

查看全文 作　　者：Yaochen [1,2]Song;Pengkai [1,2]Tang;Yanjie [1,5]Wang;Yi [1,4]Wang;Linnan [1,2]Bi;Qi [1,2]Liang;Liang [1,2]He;Qingyu [1,2]Xie;Yiyong [3]Zhang;Peng [3]Dong;Yingjie [3]Zhang;Yao [3]Yao;Jiaxuan [1,2]Liao;Sizhe [1,4]Wang 高影响力作者 机构地区：[1]Yangtze Delta Region Institute(QuZhou),University of Electronic Science and Technology of China,Qinzhou 324000,Zhejiang,China;[2]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,Sichuan,China;[3]National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology,Key Laboratory of Advanced Battery Materials of Yunnan Province,Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;[4]School of Materials Science and Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials,Shaanxi University of Science&Technology,Xi’an 710021,Shaanxi,China;[5]School of Environmental Science and Engineering,North China Electric Power University,Baoding 071003,Hebei,China高影响力机构 出　　处：《Journal of Energy Chemistry》索引2024年第88卷第1期,共11页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China (52202104);the China Postdoctoral Science Foundation (2021T140433,2020M683408);the Joint Funds of the Zhejiang Provincial Natural Science Foundation of China (LZY23B030002);the Quzhou Science and Technology Bureau Project (2021D006);the International Cooperation Projects of Sichuan Provincial Department of Science and Technology (2021YFH0126);the Fundamental Research Funds for the Central Universities (ZYGX2020ZB016);the Key Research and Development Program of Yunnan Province China (202103AA080019);the Yunnan Major Scientific and Technological Projects (202202AG050003);the Foundation of Key Laboratory of Advanced Technique&Preparation for Renewable Energy Materials,Ministry of Education,Yunnan Normal University (OF2022-04)。 摘　　要：The practical application of lithium-sulfur(Li-S)batteries,as promising next-generation batteries,is hindered by their shuttle effect and the slow redox kinetics.Herein,a tungsten and molybdenum nitride heterostructure functionalized with hollow metal-organic framework-derived carbon(W_(2)N/Mo_(2)N)was proposed as the sulfur host.The hollow spherical structure provides storage space for sulfur,enhances electrical conductivity,and inhibits volume expansion.The metal atoms in the nitrides bonded with lithium polysulfides(Li PSs)through Lewis covalent bonds,enhancing the high catalytic activity of the nitrides and effectively reducing the energy barrier of Li PSs redox conversion.Moreover,the high intrinsic conductivity of nitrides and the ability of the heterostructure interface to accelerate electron/ion transport improved the Li+transmission.By leveraging the combined properties of strong adsorption and high catalytic activity,the sulfur host effectively inhibited the shuttle effect and accelerated the redox kinetics of Li PSs.High-efficiency Li+transmission,strong adsorption,and the efficient catalytic conversion activities of Li PSs in the heterostructure were experimentally and theoretically verified.The results indicate that the W_(2)N/Mo_(2)N cathode provides stable,and long-term cycling(over 2000 cycles)at 3 C with a low attenuation rate of 0.0196%per cycle.The design strategy of a twinborn nitride heterostructure thus provides a functionalized solution for advanced Li-S batteries. 关 键 词：HETEROSTRUCTURE Adsorption Redox kinetics
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