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Sn Negative Electrode Consists of Amorphous Structures for Sodium ionSecondary Batteries

Published online by Cambridge University Press:  09 February 2016

Koki Morita ,
Naoki Okamoto ,
Takatomo Fujiyama ,
Takeyasu Saito  and
Kazuo Kondo
Koki Morita
Affiliation:
Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
Naoki Okamoto
Affiliation:
Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
Takatomo Fujiyama
Affiliation:
Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
Takeyasu Saito*
Affiliation:
Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
Kazuo Kondo
Affiliation:
Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
*
*(Email: [email protected])
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Abstract

Tin(Sn) and its alloys have been attracting attentions as a negative electrodematerial for sodium-ion secondary batteries with high theoretical capacity(Na15Sn4, ca. 847 mAh/g) and highelectromotiveforce. There still remains the issue as regards the dischargecapacity decrease with increasing the number of cycles. In order to improvecycle performance, there are many studies such as using Sn-Ni alloy, however,using Sn based alloy as negative electrode materials and it suffer from thedisadvantage of lowering of discharge capacity. In this study, a depositionprocess for making Sn film which consists of amorphous structure for negativeelectrode of sodium ion secondary batteries utilizing electordeposition fromaqueous bath was developed. The effect of additives on the surface morphologyand microstructure of Sn film was investigated. Furthermore, we evaluated theeffect of amorphous structure in the Sn film on cycle performance of the Snnegative electrode. Sn film has a good cycle characteristic (>50cycles) and discharge capacity (> 400 mAh/g). Amorphous structure inthe Sn film showed a microscopic effect on the volume change by sodiation anddesodiation.

Keywords

electrodepositionSnNa
Type
Articles
Information
MRS Advances , Volume 1 , Issue 6: Energy and Sustainability , 2016 , pp. 409 - 414
Copyright
Copyright © Materials Research Society 2016 

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References

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