Carbon-coated Si nanoparticles/reduced graphene oxide multilayer anchored to nanostructured current collector as lithium-ion battery anode

详细信息    查看全文

• 作者：Zhengjiao Liu ; Pengqian Guo ; Boli Liu ; Wenhe Xie ; Dequan Liu ; Deyan He ; ^{hedy@lzu.edu.cn}
• 关键词：Lithium-ion battery ; Si nanoparticles ; Reduced graphene oxide ; Amorphous carbon
• 刊名：Applied Surface Science
• 出版年：2017
• 出版时间：28 February 2017
• 年：2017
• 卷：396
• 期：Complete
• 页码：41-47
• 全文大小：3269 K
• 卷排序：396

文摘

Silicon is the most promising anode material for the next-generation lithium-ion batteries (LIBs). However, the large volume change during lithiation/delithiation and low intrinsic conductivity hamper its electrochemical performance. Here we report a well-designed LIB anode in which carbon-coated Si nanoparticles/reduced graphene oxide (Si/rGO) multilayer was anchored to nanostructured current collector with stable mechanical support and rapid electron conduction. Furthermore, we improved the integral stability of the electrode through introducing amorphous carbon. The designed anode exhibits superior cyclability, its specific capacity remains above 800 mAh g−1 after 350 cycles at a current density of 2.0 A g−1. The excellent electrochemical performance can be attributed to the fact that the Si/rGO multilayer is reinforced by the nanostructured current collector and the formed amorphous carbon, which can maintain the structural and electrical integrities of the electrode.