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

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

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The practical application of lithium-sulfur(Li-S)batteries,as promising next-generation batteries,is hin-dered by their shuttle effect and the slow redox kinetics.Herein,a tungsten and molybdenum nitride heterostructure functionalized with hollow metal-organic framework-derived carbon(W2N/Mo2N)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(LiPSs)through Lewis covalent bonds,enhancing the high catalytic activity of the nitrides and effectively reducing the energy barrier of LiPSs redox conversion.Moreover,the high intrin-sic 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 LiPSs.High-efficiency Li+transmission,strong adsorption,and the efficient catalytic con-version activities of LiPSs in the heterostructure were experimentally and theoretically verified.The results indicate that the W2N/Mo2N 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.

HeterostructureAdsorptionRedox kinetics

Yaochen Song、Pengkai Tang、Yanjie Wang、Yi Wang、Linnan Bi、Qi Liang、Liang He、Qingyu Xie、Yiyong Zhang、Peng Dong、Yingjie Zhang、Yao Yao、Jiaxuan Liao、Sizhe Wang

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Yangtze Delta Region Institute(QuZhou),University of Electronic Science and Technology of China,Qinzhou 324000,Zhejiang,China

School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,Sichuan,China

School of Environmental Science and Engineering,North China Electric Power University,Baoding 071003,Hebei,China

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

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

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National Natural Science Foundation of ChinaChina Postdoctoral Science FoundationChina Postdoctoral Science FoundationJoint Funds of the Zhejiang Provincial Natural Science Foundation of ChinaQuzhou Science and Technology Bureau ProjectInternational Cooperation Projects of Sichuan Provincial Department of Science and TechnologyFundamental Research Funds for the Central UniversitiesKey Research and Development Program of Yunnan Province ChinaYunnan Major Scientific and Technological ProjectsFoundation of Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials,Ministry of Education,Yunnan

522021042021T1404332020M683408LZY23B0300022021D0062021YFH0126ZYGX2020ZB016202103AA080019202202AG050003OF2022-04

2024

10.1016/j.jechem.2023.09.030

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.88(1)
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