Si/C particles on graphene sheet as stable anode for lithium-ion batteries  

作　　者：Jian Han Xiaonan Tang Shaofan Ge Ying Shi Chengzhi Zhang Feng Li Shuo Bai 

机构地区：[1]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang,110016,China [3]School of Chemical Engineering,Shandong University of Technology,Zibo,255049,China [4]Jihua Laboratory,Foshan,528225,China

出　　处：《Journal of Materials Science & Technology》2021年第21期259-265,共7页材料科学技术（英文版）

基　　金：financial support from National Natural Science Foundation of China(Nos.51525206,51927803,51902316);National Key R&D Program of China(2016YFA0200102 and 2016YFB0100100);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA22010602);Liaoning Revitalization Talents Program(No.XLYC1908015)。

摘　　要：Silicon is considered as one of the most promising anodes for Li-ion batteries(LIBs), but it is limited for commercial applications by the critical issue of large volume expansion during the lithiation. In this work, the structure of silicon/carbon(Si/C) particles on graphene sheets(Si/C–G) was obtained to solve the issue by using the void space of Si/C particles and graphene. Si/C–G material was from Si/PDA-GO that silicon particles was coated by polydopamine(PDA) and reacted with oxide graphene(GO). The Si/C–G material have good cycling performance as the stability of the structure during the lithiation/dislithiation.The Si/C–G anode materials exhibited high reversible capacity of 1910.5 mA h g^(-1) and 1196.1 mA h g^(-1) after 700 cycles at 357.9 m A g^(-1), and have good rate property of 507.2 mA h g^(-1) at high current density,showing significantly improved commercial viability of silicon electrodes in high-energy-density LIBs.

关 键 词：Li-ion batteries POLYDOPAMINE Graphene sheets Silicon anode 

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