Enhanced reversible lithium storage in a nanosize silicon/graphene composite.
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Date
2010-02
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Publisher
Elsevier
Abstract
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. © 2010, Elsevier Ltd.
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Keywords
Silicon, Electric batteries, Lithium ions, Ionic conductivity, Composite materials, Electrodes
Citation
Chou, S. L., Wang, J. Z., Choucair, M., Liu, H. K., Stride, J. A., & Dou, S. X. (2010). Enhanced reversible lithium storage in a nanosize silicon/graphene composite. Electrochemistry Communications, 12(2), 303-306. doi:10.1016/j.elecom.2009.12.024