P(VDF-HFP)-poly(sulfur-1,3-diisopropenylbenzene) functional polymer electrolyte for lithium–sulfur batteries  

作　　者：Jiang-Hui Jiang An-Bang Wang Wei-Kun Wang Zhao-Qing Jin Li-Zhen Fan 

机构地区：[1]Beijing Advanced Innovation Center for Materials Genome Engineering,Institute of Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China [2]Military Power Sources Research and Development Center,Research Institute of Chemical Defense,Beijing 100191,China

出　　处：《Journal of Energy Chemistry》2020年第7期114-122,I0004,共10页能源化学（英文版）

基　　金：Financial supports from the National Natural Science Foundation of China(51532002 and 51872027);Beijing Natural Science Foundation(L172023);National Basic Research Program of China(2016YFA0202500,2017YFE0113500,and 2018YFB0104300)。

摘　　要：Lithium–sulfur(Li–S)battery as a high-energy density electrochemical energy storage system has attracted many researchers’attention.However,the shuttle effect of Li–S batteries and the challenges associated with lithium metal anode caused poor cycle performance.In this work,the organosulfide poly(sulfur-1,3-diisopropenylbenzene)(PSD)was prepared as cathode material and additive of P(VDFHFP)polymer electrolyte(P(VDF-HFP)).It was verified that P(VDF-HFP)polymer electrolyte with 10%PSD(P(VDF-HFP)-10%PSD)showed a higher ionic conductivities than that of liquid electrolyte up to2.27×10-3 S cm-1 at room temperature.The quasi-solid-state Li-S batteries fabricated with organosulfide cathode material PSD and P(VDF-HFP)based functional polymer electrolyte delivered good cycling stability(780 m Ah g-1 after 200 th cycle at 0.1 C)and rate performance(613 m Ah g-1 at 1 C).The good cycling performance could be attributed to the synergistic effect of components,including the interaction between polysulfides and polymer main chain in the organosulfide cathode,the sustained organic/inorganic hybrid stable SEI layer formed by polymer electrolyte additive PSD,the improved cathode/electrolyte interface and the good affinity between P(VDF-HFP)based functional polymer electrolyte and Li metal surface.This strategy herein may provide a new route to fabricate high-performance Li–S batteries through the organosulfide cathode and functional polymer electrolyte.

关 键 词：Organosulfide cathode Functional polymer electrolyte Stable SEI layer Quasi-solid-state Li–S batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]