Structural and morphological modifications of a nanosized 62 atom percent Sn-Ni thin film anode during reaction with lithium

Hitomi Mukaibo*, Toshiyuki Momma, Mohamed Mohamedi, Tetsuya Osaka

*この研究の対応する著者

研究成果: Article査読

68 被引用数 (Scopus)

抄録

Nanosized electrodeposited 62 atom % Sn-Ni alloy was tested to highlight the effects of volume changes on the cycling life of the electrode during lithiation and delithiation. X-ray diffraction showed that the Ni 3Sn4 was the main phase of the as-deposited alloy. A unique feature of the 62 atom % Sn-Ni is that it exhibited a capacity recovery upon cycling. When cycled galvanostatically, the Sn62Ni38 offers low capacity fade while reversibly incorporating lithium up to 600 mAh/g. At the first charge LiSn alloy phases are formed. This led to volume expansion of the electrode causing the formation of cracks. At the following cycles the Ni3Sn4, phase was restored and preserved over extensive cycling revealing the reversibility of the reaction between Ni 3Sn4, and Li+. As to the reasons of the capacity recovery noticed with this alloy, scanning electron microscopy images provided evidence of modifications of the surface condition accompanying a volume change during cycling. The chemical diffusion coefficient (D Li) value determined from electrochemical impedence spectroscopy measurements during lithium insertion was within 10-9 to 10 -10 cm2 s-1.

本文言語English
ページ(範囲)A560-A565
ジャーナルJournal of the Electrochemical Society
152
3
DOI
出版ステータスPublished - 2005

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

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