Electrochemical Properties of Graphene/CdS Quantum Dot Composites

doi:10.3724/SP.J.1077.2011.00912

Abstract

Abstract: Graphene/CdS quantum dot composites were prepared via in situ synthesis and its electrochemical performances as anode material for lithium-ion batteries were investigated. Ac impendence spectra reveal that electrolytes form a fine solid electrolyte interphase film (SEI) on the surface of the graphene/CdS quantum dot composites. The initial discharge capacity of the lithium-ion battery using graphene/CdS quantum dot as anode is about to 1264.7mAh/g and reversible capacity is 888.9mAh/g after 20 cycles. The results indicate that the CdS quantum dot improve the stability of the graphene structure and the conductivity between graphene sheets, so the electrochemical performance of graphene/CdS quantum dot composites as anode materials is obviously better than that of graphene materials.

Key words: graphene, CdS, quantum dot, lithium-ion battery, composite materials

CLC Number:

TM912

TAO Li-Hua, CAI Yan, LI Zai-Jun, REN Guo-Xiao, LIU Jun-Kang. Electrochemical Properties of Graphene/CdS Quantum Dot Composites[J]. Journal of Inorganic Materials, 2011, 26(9): 912-916.

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