无机材料学报2017，Vol.32Issue(7)：705-712,8.DOI:10.15541/jim20160520
锂离子电池硅/碳纳米管/石墨烯自支撑负极材料研究
Silicon/CNTs/Graphene Free-standing Anode Material for Lithium-ion Battery
白雪君 1刘婵 1侯敏 1王彪 2曹辉 1付俊杰3
作者信息
- 1. 上海航天电源技术有限责任公司, 上海 201615
- 2. 东华大学 材料科学与工程学院, 上海 201620
- 3. 上海空间电源研究所, 上海 201216
- 折叠
摘要
Abstract
Porous 2D Silicon/CNTs/Graphene free-standing composites were prepared via a solution-based self-assembly process with vapor post-treatment and applied as anodes for lithium-ion batteries. Silicon nanoparti-cles (~50 nm) as active materials were uniformly embedded between graphene sheets without agglomeration. Gra-phene was used as electrical conductive carbon matrix to form a 2D conductive network for electrons. CNTs, with high electrical conductivity and mechanical strength, formed into a scaffold along with graphene to enhance the conductivity and mechanical properties of the carbon matrix. After vapor post-treatment, CNTs supported graphene film transferred from a tightly stacked film to a loose packed porous film. The porous structure of this free-standing composite anode provides large internal space to accommodate volumetric changes and provide abundant channels for diffusion of Li+, fast electron transport and easy penetration of electrolyte. The composites exhibite an outstanding rate performance and cyclic stability, delivering a capacity of 600 mAh/g at 4/A g and 1010 mAh/g after 100 cycles at 0.1 A/g. They also show high structure and mechanical stability after cycle test. It provides an exciting pathway to the rational design and fabrication of silicon anode and 2D graphene matrix for applications in lithium-ion batteries.关键词
石墨烯/硅/锂离子电池/自支撑/蒸汽处理Key words
graphene/silicon/lithium-ion battery/free-standing/vapor post-treatment分类
信息技术与安全科学引用本文复制引用
白雪君,刘婵,侯敏,王彪,曹辉,付俊杰..锂离子电池硅/碳纳米管/石墨烯自支撑负极材料研究[J].无机材料学报,2017,32(7):705-712,8.
