Enhanced reversible lithium storage in a nanosize silicon/graphene composite

Authors

Shulei Chou, University of WollongongFollow
Jiazhao Wang, University of WollongongFollow
Mohammad Choucair, School of Chemistry University of NSW
Hua-Kun Liu, University of WollongongFollow
John A. Stride, School of Chemistry University NSW
S X. Dou, University of WollongongFollow

RIS ID

31886

Publication Details

Chou, S, Wang, J, Choucair, M, Liu, HK, Stride, JA & Dou, SX (2010), Enhanced reversible lithium storage in a nanosize silicon/graphene composite, Electrochemistry Communications, 12(2), pp. 303-306.

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.

Grant Number

ARC/DP0987805

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0987805