Double core-shell nanostructured Sn-Cu alloy as enhanced anode materials for lithium and sodium storage

作     者：Luoyang LI Tian CHEN Fengbin HUANG Peng LIU Qingrong YAO Feng WANG Jianqiu DENG Luoyang LI;Tian CHEN;Fengbin HUANG;Peng LIU;Qingrong YAO;Feng WANG;Jianqiu DENG

作者机构：School of Materials Science and Engineering&Guangxi Key Laboratory of Intormation MaterialsGuilin University of Electronic TechnologyGuilin 541004China 

出 版 物：《Frontiers of Materials Science》 (材料学前沿（英文版）)

年 卷 期：2020年第14卷第2期

页      面：133-144页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51661009 and 51761007) supported by the Guangxi Natural Science Foundation(2019GXNSFDA245014) 

主　　题：lithium-ion battery sodium-ion battery Sn-based alloy anode double core-shell structure 

摘      要：Sn-based alloy materials are considered as a promising anode candidate for lithium-ion batteries(LIBs)and sodium-ion batteries(SIBs),whereas they suffer from severe volume change during the discharge/charge *** address the issue,double core-shell structured Sn-Cu@SnO2@C nanocomposites have been prepared by a simple co-precipitation method combined with carbon coating *** double core-shell structure consists of Sn-Cu multiphase alloy nanoparticles as the inner core,intermediate SnO2 layer anchored on the surface of Sn-Cu nanoparticle and outer carbon *** Sn-Cu@SnO2@C electrode exhibits outstanding electrochemical perfor-mances,delivering a reversible capacity of 396 mA·h·g^-1 at 100 mA·g^-1 after 100 cycles for LIBs and a high initial reversible capacity of 463 mA·h·g^-1 at 50 mA·g^-1 and a capacity retention of 86% after 100 cycles,along with a remarkable rate capability(193 mA·h·g^-1 at 5000 mA·g^-1)for *** work provides a viable strategy to fabricate double core-shell structured Sn-based alloy anodes for high energy density LIBs and SIBs.