Liquid metal in prohibiting polysulfides shuttling in metal sulfides anode for sodium-ion batteries  

作　　者：Xiaobo Zheng Xinwei Guan Xuan Cheng Xiaoning Li Yang Fu Yitong Li Zhi Zheng Weikong Pang Xun Xu Peng Li Tianyi Ma 

机构地区：[1]Institute for Superconducting&Electronic Materials,Australian Institute for Innovative Materials,University of Wollongong,Wollongong,NSW 2522,Australia [2]School of Science,RMIT University,Melbourne,VIC 3000,Australia [3]CSIRO Manufacturing,Clayton,VIC 3168,Australia

出　　处：《Journal of Energy Chemistry》2024年第9期559-567,共9页能源化学（英文版）

基　　金：the financial support from the Australian Research Council (ARC) through Future Fellowship (FT210100298);DECRA Fellowship (DE230101068);Discovery Project (DP230100198 and DP210102215);Linkage Projects (LP220100088 and LP180100722);partially supported by AIIM FOR GOLD Grant (2017, 2018)

摘　　要：Metal sulfides are a class of promising anode materials for sodium-ion batteries(SIBs)owing to their high theoretical specific capacity.Nevertheless,the reactant products(polysulfides)could dissolve into electrolyte,shuttle across separator,and react with sodium anode,leading to severe capacity loss and safety concerns.Herein,for the first time,gallium(Ga)-based liquid metal(LM)alloy is incorporated with MoS_(2)nanosheets to work as an anode in SIBs.The electron-rich,ultrahigh electrical conductivity,and self-healing properties of LM endow the heterostructured MoS_(2)-LM with highly improved conductivity and electrode integrity.Moreover,LM is demonstrated to have excellent capability for the adsorption of polysulfides(e.g.,Na_(2)S,Na_(2)S_(6),and S_(8))and subsequent catalytic conversion of Na_(2)S.Consequently,the MoS_(2)-LM electrode exhibits superior ion diffusion kinetics and long cycling performance in SIBs and even in lithium/potassium-ion battery(LIB/PIB)systems,far better than those electrodes with conventional binders(polyvinylidene difluoride(PVDF)and sodium carboxymethyl cellulose(CMC)).This work provides a unique material design concept based on Ga-based liquid metal alloy for metal sulfide anodes in rechargeable battery systems and beyond.

关 键 词：GalnSn liquid metal alloy MoS_(2) Polysulfides shuttle effects Catalytic conversion Sodium-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]