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

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

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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 elec-trolyte,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 MoS2 nanosheets to work as an anode in SIBs.The electron-rich,ultrahigh electrical conductivity,and self-healing properties of LM endow the heterostructured MoS2-LM with highly improved conductivity and electrode integrity.Moreover,LM is demonstrated to have excellent capability for the adsorption of poly-sulfides(e.g.,Na2S,Na2S6,and S8)and subsequent catalytic conversion of Na2S.Consequently,the MoS2-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 bin-ders(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.

GaInSn liquid metal alloyMoS2Polysulfides shuttle effectsCatalytic conversionSodium-ion batteries

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

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Institute for Superconducting & Electronic Materials,Australian Institute for Innovative Materials,University of Wollongong,Wollongong,NSW 2522,Australia

School of Science,RMIT University,Melbourne,VIC 3000,Australia

CSIRO Manufacturing,Clayton,VIC 3168,Australia

Australian Research Council(ARC)through Future FellowshipDECRA FellowshipDiscovery ProjectDiscovery ProjectLinkage ProjectsLinkage ProjectsAIIM FOR GOLD GrantAIIM FOR GOLD Grant

FT210100298DE230101068DP230100198DP210102215LP220100088LP18010072220172018

2024

10.1016/j.jechem.2024.05.016

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.96(9)