Article Title

SnO₂/graphene composite with high lithium storage capability for lithium rechargeable batteries

Authors

Haegyeom Kim, Graduate School of Energy, Environment, Water, and Sustainability, Korea Advanced Institute of Science and Technology (KAIST), 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea
Sung-Wook Kim, Department of Materials Science and Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea
Young-Uk Park, Department of Materials Science and Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea
Hyeokjo Gwon, Department of Materials Science and Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea
Dong-Hwa Seo, Department of Materials Science and Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea
Yuhee Kim, Korea Institute of Science and Technology (KIST), 39-1 Hawolgok-dong, Wolsong-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
Kisuk Kang, Graduate School of Energy, Environment, Water, and Sustainability, Korea Advanced Institute of Science and Technology (KAIST), 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea Department of Materials Science and Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea KAIST Institute for Eco-energy, Nanocentury, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea

Keywords

Graphene, SnO2, surface charge, nanocomposite, rechargeable batteries, lithium

Abstract

SnO2/graphene nanocomposites have been fabricated by a simple chemical method. In the fabrication process, the control of surface charge causes echinoid-like SnO2 nanoparticles to be formed and uniformly decorated on the graphene. The electrostatic attraction between a graphene nanosheet (GNS) and the echinoid-like SnO2 particles under controlled pH creates a unique nanostructure in which extremely small SnO2 particles are uniformly dispersed on the GNS. The SnO2/graphene nanocomposite has been shown to perform as a high capacity anode with good cycling behavior in lithium rechargeable batteries. The anode retained a reversible capacity of 634 mA∙h∙g–1 with a coulombic efficiency of 98% after 50 cycles. The high reversibility can be attributed to the mechanical buffering by the GNS against the large volume change of SnO2 during delithiation/lithiation reactions. Furthermore, the power capability is significantly enhanced due to the nanostructure, which enables facile electron transport through the GNS and fast delithiation/lithiation reactions within the echinoid-like nano- SnO2. The route suggested here for the fabrication of SnO2/graphene hybrid materials is a simple economical route for the preparation of other graphene-based hybrid materials which can be employed in many different fields.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-010-0050-4

Publisher

Tsinghua University Press

Recommended Citation

Haegyeom Kim,Sung-Wook Kim,Young-Uk Park,Hyeokjo Gwon,Dong-Hwa Seo,Yuhee Kim,Kisuk Kang, SnO2/graphene composite with high lithium storage capability for lithium rechargeable batteries. NanoRes.2010, 3(11): 813–821