Enhanced reversible lithium storage in a nanosize silicon/graphene composite

被引：379

作者：

Chou, Shu-Lei ^{[1
,2
]}

Wang, Jia-Zhao ^{[1
,2
]}

Choucair, Mohammad ^{[3
]}

Liu, Hua-Kun ^{[1
,2
]}

Stride, John A. ^{[3
,4
]}

Dou, Shi-Xue ^{[1
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

[2] Univ Wollongong, ARC Ctr Excellence Electromat Sci, Wollongong, NSW 2522, Australia

[3] Univ New S Wales, Sch Chem, Sydney, NSW 2052, Australia

[4] Australian Nucl Sci & Technol Org, Bragg Inst, Menai, NSW 2234, Australia

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2010年 / 12卷 / 02期

基金：

澳大利亚研究理事会;

关键词：

Silicon; Graphene; Nano; Lithium-ion battery; Composite; LI-ION BATTERIES; ANODE MATERIAL; RECHARGEABLE BATTERIES; GRAPHENE NANOSHEETS; NEGATIVE ELECTRODES; SILICON; SI; PERFORMANCE; INSERTION; CAPACITY;

D O I：

10.1016/j.elecom.2009.12.024

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：303 / 306

页数：4

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