Heterogeneous Mediator Enabling Three-Dimensional Growth of Lithium Sulfide for High-Performance Lithium-Sulfur Batteries

作     者：Da Tian Xueqin Song Yue Qiu Xun Sun Bo Jiang Chenghao Zhao Yu Zhang Xianzhu Xu Lishuang Fan Naiqing Zhang Da Tian;Xueqin Song;Yue Qiu;Xun Sun;Bo Jiang;Chenghao Zhao;Yu Zhang;Xianzhu Xu;Lishuang Fan;Naiqing Zhang

作者机构：School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Academy of Fundamental and Interdisciplinary SciencesHarbin Institute of TechnologyHarbin 150001China State Keys Laboratory of Urban Water Resource and EnvironmentHarbin Institute of TechnologyHarbin 150001China 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2022年第5卷第4期

页      面：1214-1221页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(22078078) 

主　　题：electrocatalysis lithium sulfide nucleation lithium-sulfur batteries polysulfide redox reaction shuttle effect 

摘      要：Two-dimensional(2D)deposition regime of insulating lithium sulfide(Li_(2)S)is a major obstacle to achieve high reversible capacity in the conventional glyme-based lithium-sulfur(Li-S)batteries as it leads to rapid loss of active electrode surface and low sulfur *** three-dimensional(3D)growth of Li_(2)S is therefore considered to be necessary,but the available strategies are mainly based on the electrolyte manipulations,which inevitably lead to added complexity of the electrode-electrolyte compatibility and,in particular,instability of the lithium *** this work,we have developed a heterogeneous polysulfide mediator composed of discrete Mo_(5)N_(6) anchored on graphene,which functions on the cathode side,to regulate the deposition mode of Li_(2)***_(5)N_(6) can efficiently boost the formation of Li_(2)S as demonstrated by a series of experimental and computational *** importantly,the discrete distribution of Mo_(5)N_(6) nucleants on graphene postpones the merging of adjacent Li_(2)S nuclei to promote their isotropic ***,3D deposits of Li_(2)S is guided by the heterogeneous *** from these unique superiorities,Li-S cells with high rate capability of 954 mAh g^(-1) at 2 C and long cycle life exceeding 1000 cycles are realized without advanced lithium anode protection.