Laterally Confined Graphene Nanosheets and Graphene/SnO2 Composites as High-Rate Anode Materials for Lithium-Ion Batteries

被引:127
作者
Wang, Zhiyong [1 ]
Zhang, Hao [2 ]
Li, Nan [1 ]
Shi, Zujin [1 ]
Gu, Zhennan [1 ]
Cao, Gaoping [2 ]
机构
[1] Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
[2] Res Inst Chem Def, Beijing 100083, Peoples R China
基金
中国国家自然科学基金;
关键词
Carbon; graphene; anode; lithium-ion batteries; SnO2; nanomaterials; HIGH-RATE CAPABILITY; RATE PERFORMANCE; HIGH-POWER; ELECTRODES; GRAPHITE; INTERCALATION; STORAGE; DIFFUSION; INSERTION; CAPACITY;
D O I
10.1007/s12274-010-0041-5
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
High-rate anode materials for lithium-ion batteries are desirable for applications that require high power density. We demonstrate the advantageous rate capability of few-layered graphene nanosheets, with widths of 100-200 nm, over micro-scale graphene nanosheets. Possible reasons for the better performance of the former include their smaller size and better conductivity than the latter. Combination of SnO2 nanoparticles with graphene was used to further improve the gravimetric capacities of the electrode at high charge discharge rates. Furthermore, the volumetric capacity of the composites was substantially enhanced compared to pristine graphene due to the higher density of the composites.
引用
收藏
页码:748 / 756
页数:9
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