Construction of SnS-Mo-graphene nanosheets composite for highly reversible and stable lithium/sodium storage  

作　　者：Deliang Cheng Lichun Yang Renzong Hu Jie Cui Jiangwen Liu Min Zhu 

机构地区：[1]School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China [2]Institute of Advanced Materials,Jiangxi Normal University,Nanchang 330022,China [3]Analytical and Testing Center,South China University of Technology,Guangzhou 510640,China

出　　处：《Journal of Materials Science & Technology》2022年第26期190-198,共9页材料科学技术（英文版）

基　　金：the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(Nos.51621001,51671088 and 51671089)。

摘　　要：Sn-based chalcogenides are considered as one of the most promising anode materials for lithium-ion batteries(LIBs)because of their high capacities through both conversion and alloying reactions.However,the realization of full capacities of Sn-based chalcogenides is mainly hindered by the large volume variation and inferior reversibility of conversion reaction during cycling.In present work,a new ternary Sn SMo-graphene nanosheets(Sn S-Mo-GNs)composite is fabricated by a simple and scalable plasma milling method,in which Sn S nanoparticles are tightly bonded with Mo and GNs.The Mo and GNs additives can effectively alleviate the large volume change of Sn S upon cycling,which leads to a stable electrochemical framework.Moreover,they can significantly suppress the Sn agglomeration in lithiated Sn S,which enables highly reversible conversion reaction during cycling.As anode for LIBs,the Sn S-Mo-GNs composite exhibits a high initial coulombic efficiency of 86.9%(almost complete reversibility of Sn S,~97.3%),high cyclic coulombic efficiency after initial three cycles(>99.5%),and long lifespan(up to 600 cycles).Moreover,it also demonstrates superior electrochemical performance for sodium storage.Thus,this work demonstrates a potential anode for batteries application and provides a viable strategy to obtain highly reversible and stable anodes for lithium/sodium storage.

关 键 词：SnS nanoparticle Mo metal Graphene nanosheets REVERSIBILITY ANODE 

分 类 号：TB332[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]