Research Article

Nano Research

, Volume 3, Issue 10, pp 748-756

Open Access This content is freely available online to anyone, anywhere at any time.

Laterally confined graphene nanosheets and graphene/SnO2 composites as high-rate anode materials for lithium-ion batteries

  • Zhiyong WangAffiliated withBeijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University
  • , Hao ZhangAffiliated withResearch Institute of Chemical Defense
  • , Nan LiAffiliated withBeijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University
  • , Zujin ShiAffiliated withBeijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University Email author 
  • , Zhennan GuAffiliated withBeijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University
  • , Gaoping CaoAffiliated withResearch Institute of Chemical Defense

Abstract

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.

Keywords

Carbon graphene anode lithium-ion batteries SnO2 nanomaterials