期刊
ELECTROCHIMICA ACTA
卷 56, 期 6, 页码 2656-2664出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.12.015
关键词
Tin alloys; Lithium battery; Molten LiCl-KCl; Electrodeposition
资金
- EGIDE [AI MA/06/14707]
Ni3Sn2 and several Co-Sn alloys prepared by electrodeposition in molten LiCl-KCl were studied as anode materials in rechargeable Li-ion battery. In the case of Ni3Sn2, the charge-discharge curves do not exhibit any plateau in contrast with Co-Sn alloys. For Ni3Sn2, the reversible capacity and the coulombic efficiency tend to constant values of about 225 mAh/g and 85%, respectively, after subsequent cycles. Among the studied Co-Sn alloys, the best electrochemical performances was observed when CoSn2 was used as anode material: the reversible capacity and the coulombic efficiency observed after 60 cycles were about 530 mAh/g and 96%, respectively. Whatever the alloys. SEM investigations performed before and after cycling do not reveal any significant difference between the original material and the cycled material, indicating a good stability of the electrodeposited films upon cycling. (C) 2010 Elsevier Ltd. All rights reserved.
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