Simultaneous realization of high sulfur utilization and lithium dendrite-free via dual-effect kinetic regulation strategy toward lithium-sulfur batteries  

作　　者：Xinqi Zhao Xiaohong Sun Ruisong Guo Song Wang Fuyun Li Tingting Li Wen Zhang Chunming Zheng Lingyun An Leichao Meng Xudong Hu 

机构地区：[1]Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education,School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China [2]Qinghai Provincial Key Laboratory of Nanomaterials and Technology,School of Physics and Electronic Information Engineering,Qinghai Minzu University,Xining 810007,Qinghai,China [3]Department of Chemistry&Biochemistry,University of California,Santa Barbara,CA 93106,United States

出　　处：《Journal of Energy Chemistry》2023年第6期260-271,I0007,共13页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (52073212,52272303)。

摘　　要：With the high theoretical specific capacity and energy density,lithium-sulfur batteries(LSBs)have been intensively studied as promising candidates for energy storage devices.However,LSBs are largely hindered by inferior sulfur utilization and uncontrollable dendritic growth.Herein,a hierarchical functionalization strategy of stepwise catalytic-adsorption-conversion for sulfur species via the synergetic of the efficiently catalytic host cathode and light multifunctional interlayer has been proposed to concurrently address the issues arising on the dual sides of the LSBs.The multi-layer SnS_(2) micro-flowers embedded into the natural three-dimensional(3D)interconnected carbonized bacterial cellulose(CBC)nanofibers are fabricated as the sulfur host that provides numerous catalytic sites for the rapid catalytic conversion of sulfur species.Moreover,the distinctive CBC-based SnO_(2)-SnS_(2) heterostructure network accompanied high conductive carbon nanofibers as the multifunctional interlayer promotes the rapid anchoringdiffusion-conversion of lithium polysulfides,Li^(+)flux redistribution,and uniform Li deposition.LSBs equipped with our strategy exhibit a high reversible capacity of 1361.5 m A h g^(-1)at 0.2 C and superior cycling stability with an ultra-low capacity fading of 0.031%per cycle in 1000 cycles at 1.5 C and 0.046%at 3 C.A favorable specific capacity of 859.5 m A h g^(-1)at 0.3 C is achieved with a high sulfur mass loading of 5.2 mg cm^(-2),highlighting the potential of practical application.The rational design in this work can provide a feasible solution for high-performance LSBs and promote the development of advanced energy storage devices.

关 键 词：Lithium-sulfur battery Catalytic sulfur host Multifunctional interlayer Polysulfides adsorbing-conversion Dendrite-free 

分 类 号：O643.36[理学—物理化学] TM912[理学—化学]