A novel synthesis of Nb_(2)O_(5)@rGO nanocomposite as anode material for superior sodium storage  

作　　者：Yu Zhang Li Fang Wang Sun Bin Shi Xiaotao Chen Yujie Gu Kunpeng Ding Zhenhua Wang Kening Sun 

机构地区：[1]Beijing Key Laboratory for Chemical Power Source and Green Catalysis,School of Chemistry and Chemical Engineering,BIT-QUB Joint Center on Novel Energy and Materials Research,Beijing Institute of Technology,Beijing 100081,China [2]State Key Laboratory of Advanced Chemical Power Sources,Guizhou Meiling Power Sources Co.,Ltd.,Zunyi 563003,China [3]Yinlong Energy Co.,Ltd.,Zhuhai 519000,China

出　　处：《Chinese Chemical Letters》2021年第3期1144-1148,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21576028 and 21506012);the Opening Project of State Key Laboratory of Advanced Chemical Power Sources(No.SKL-ACPS-C-19)。

摘　　要：The development of novel anode materials,with superior rate capability,is of utmost significance for the successful realization of sodium-ion batteries(SIBs).Herein,we present a nanocomposite of Nb_(2)O_(5)and reduced graphene oxide(rGO)by using hydrothermal-assisted microemulsion route.The water-in-oil microemulsion formed nanoreactors,which restrained the particle size of Nb_(2)O_(5)and shortened the diffusion length of ions.Moreover,the rGO network prevented agglomeration of Nb_(2)O_(5)nanoparticles and improved electronic conductivity.Consequently,Nb_(2)O_(5)@rGO nanocomposite is employed as anode material in SIBs,delivering a capacity of 195 mAh/g after 200 charge/discharge cycles at 0.2 A/g.Moreover,owing to conductive rGO network,the Nb_(2)O_(5)@rGO electrode rende red a specific capacity of 76 mAh/g at high current density of 10 A/g and maintained 98 mAh/g after 1000 charge/discharge cycles at 2 A/g.The Nb_(2)O_(5)@rGO electrode material prepared by microemulsion method shows promising possibilities for application of SIBs.

关 键 词：Nb_(2)O_(5)@rGO nanocomposite MICROEMULSION Anode material Sodium-ion battery 

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]