Fabrication of uniform Si-incorporated SnO2 nanoparticles on graphene sheets as advanced anode for Li-ion batteries
By Liang, Xianqing; Wang, Junjie; Zhang, Siyu; Wang, Luyang; Wang, Weifang; Li, Liuyan; Wang, Haifu; Huang, Dan; Zhou, Wenzheng; Guo, Jin
Published in Applied Surface Science
2019
Abstract
SnO2-based anodes with high capacity are appealing for Li-ion batteries (LIBs). However, the large volume change and inferior cycling stability limit their practical application. To mitigate these problems, a novel nanocomposite of silicon-incorporated SnO2 with graphene sheets (STOG) has been successfully fabricated as anode material for LIBs. Through a simple hydrolysis process, ultrafine Si-incorporated SnO2 (STO) nanoparticles are uniformly loaded on the graphene sheets. Further it is found that Si incorporation brings about the SiOSn bonding in the SnO2 matrix and strengthens the SnOC bonding between STO and graphene. These merits can enhance the structural stability and electron/ion transport of STOG nanocomposite, facilitating the reversible conversion of Sn