石墨烯/CdS量子点复合材料的电化学性能研究

doi:10.3724/SP.J.1077.2011.00912

无机材料学报 ›› 2011, Vol. 26 ›› Issue (9): 912-916.DOI: 10.3724/SP.J.1077.2011.00912 CSTR: 32189.14.SP.J.1077.2011.00912

石墨烯/CdS量子点复合材料的电化学性能研究

陶丽华¹, 蔡燕¹, 李在均¹, 任国晓², 刘俊康¹

(1. 江南大学化学与材料工程学院, 无锡214122; 2. 浙江赞宇科技股份有限公司, 杭州310009 )

收稿日期:2010-10-28 修回日期:2011-01-18 出版日期:2011-09-20 网络出版日期:2011-08-19
作者简介:陶丽华(1987-), 女, 硕士研究生.
基金资助:
国家自然科学基金(20771045); 浙江省自然科学基金(Y4100729)

Electrochemical Properties of Graphene/CdS Quantum Dot Composites

TAO Li-Hua¹, CAI Yan¹, LI Zai-Jun¹, REN Guo-Xiao², LIU Jun-Kang¹

(1. School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China; 2. Zhejiang Zanyu Technology Co., LTD., Hangzhou 310009, China)

Received:2010-10-28 Revised:2011-01-18 Published:2011-09-20 Online:2011-08-19
Supported by:
National Natural Science Foundation of China(20771045); Natural Science Foundation of Zhejiang Province (Y4100729)

摘要/Abstract

摘要： 原位合成法制备石墨烯/CdS量子点复合材料, 并考察其作为锂离子电池负极材料的电化学性能. 交流阻抗揭示电解质在石墨烯/CdS量子点复合材料表面形成稳定的SEI膜, 首次放电比容量达1264.7mAh/g, 循环20次后可逆容量为888.9mAh/g. 结果显示CdS量子点提高了石墨烯结构的稳定和层间传导性, 从而导致复合材料的电化学性能明显优于单独的石墨烯材料.

关键词: 石墨烯, 硫化镉, 量子点, 锂离子电池, 复合材料

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

中图分类号:

TM912

陶丽华, 蔡燕, 李在均, 任国晓, 刘俊康. 石墨烯/CdS量子点复合材料的电化学性能研究[J]. 无机材料学报, 2011, 26(9): 912-916.

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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石墨烯/CdS量子点复合材料的电化学性能研究

Electrochemical Properties of Graphene/CdS Quantum Dot Composites

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