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Two-dimensional multimetallic sulfide nanosheets with multi-active sites to enhance polysulfide redox reactions in liquid Li2S6-based lithium-polysulfide batteries

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Journal of Energy Chemistry 2021年第1期30卷 163-169,I0006页

作者： Chenyang Zha Donghai Wu Yuwei Zhao Jun Deng Jinghua Wu Rong Wu Meng Yang Lin Wang Houyang Chen Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)Nanjing Tech UniversityNanjing 211816JiangsuChina Henan Key Laboratory of Nanocomposites and Applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou 450006HenanChina Department of Chemical and Biological Engineering University at BuffaloThe State University of New YorkBuffaloNY 14260-4200USA Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina School of Materials and Chemical Technology Tokyo Institute of Technology2-12-1 OokayamaMeguroTokyo 152-8550Japan

The lithium-sulfur battery has attracted enormous attention as being one of the most significant energy storage technologies due to its high energy density and ***,the "shuttle effect" of polysulfide intermediates represents a formidable challenge towards its wide ***,we have designed and synthesized two-dimensional Cu,Zn and Sn-based multimetallic sulfide nanosheets to construct multi-active sites for the immobilization and entrapment of polysulfides with offering better performance in liquid Li2S6-based lithium-polysulfide *** experimental measurements and theoretical computations demonstrate that the interfacial multi-active sites of multimetallic sulfides not only accelerate the multi-chained redox reactions of highly diffusible polysulfides,but also strengthen affinities toward *** adopting multimetallic sulfide nanosheets as the sulfur host,the liquid Li2 S6-based cell exhibits an impressive rate capability with 1200 mAh/g and retains 580 mAh/g at 0.5 mA/cm^(2) after 1000 *** high sulfur mass loading conditions,the cell with 2.0 mg/cm^(2) sulfur loading delivers a cell capacity of 1068 mAh/g and maintains 480 mAh/g with 0.8 mA/cm^(2) and 500 *** study provides new insights into the multifunctional material design with multi-active sites for elevated lithium-polysulfide batteries.

关键词： multimetallic sulfide Nanosheets Multi-active sites Lithium-polysulfide battery

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