期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 12, 期 2, 页码 303-306出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.12.024
关键词
Silicon; Graphene; Nano; Lithium-ion battery; Composite
资金
- Australian Research Council (ARC) [DP0987805]
- ARC Centre of Excellence [CE0561616]
- Australian Research Council [DP0987805] Funding Source: Australian Research Council
Si/graphene composite was prepared by simply mixing of commercially available nanosize Si and graphene. Electrochemical tests show that the Si/graphene composite maintains a capacity of 1168 mAh g(-1) and an average coulombic efficiency of 93% up to 30 cycles. EIS indicates that the Si/graphene composite electrode has less than 50% of the charge-transfer resistance compared with nanosize Si electrode, evidencing the enhanced ionic conductivity of Si/graphene composite. The enhanced cycling stability is attributed to the fact that the Si/graphene composite can accommodate large volume charge of Si and maintain good electronic contact. (C) 2009 Elsevier B.V. All rights reserved.
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