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
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2021,（21）
• 页码范围: 259-265
• 页数: 7页
• 语种: 英文

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 mA 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.