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Three-dimensional architectures based on carbon nanotube bridged Ti_(2)C MXene nanosheets for Li-S batteries

查看全文 作　　者：Qinhua [1,2]Gu;Ming [1,3]Lu;Junnan [1,2]Chen;Yujie [1,2]Qi;Bingsen [1,2]Zhang 高影响力作者 机构地区：[1]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;[2]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;[3]Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,Jilin Normal University,Changchun 130103,China高影响力机构 出　　处：《Particuology》索引2021年第19卷第4期,共7页高影响力期刊 基　　金：The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China(No.51932005,22072164);Liaoning Revitalization Talents Program(No.XLYC1807175);the Research Fund of Shenyang National Laboratory for Materials Science. 摘　　要：Lithium-sulfur(Li-S)batteries are promising candidates for high density electrochemical energy storage systems.However,the poor conductivity of S and the shuttle effect of polysulfides are a bottleneck to practical applications.Herein,a three-dimensional architecture,based on carbon nanotube(CNT)bridged Ti_(2)C MXene nanosheets,was constructed as a sulfur host.This architecture was based on Ti atoms,which can chemically absorb polysulfides.The CNTs are highly conductive and intercalate into the MXene nanosheets to prevent their stacking and construct an interspace for polysulfides.This hybrid,as a host of S,can effectively alleviate the shuttle effect through a combination of physical confinement and chemical adsorption.This resulted in an open internal space,which served as a cathode for the loaded S to promote electron transport and enhance electrochemical kinetics of the polysulfide conversion in Li-S batteries. 关 键 词：Li-S batteries Shuttle effect MXene POLYSULFIDES Three-dimensional(3D)architecture
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