Gallium (III) sulfide as an active material in lithium secondary batteries

Hiroshi Senoh, Hiroyuki Kageyama, Tomonari Takeuchi, Koji Nakanishi, Toshiaki Ohta, Hikari Sakaebe, Masaru Yao, Tetsuo Sakai, Kazuaki Yasuda

研究成果: Contribution to journalArticle査読

23 被引用数 (Scopus)

抄録

In an attempt to identify an active material for use in lithium secondary batteries with high energy density, we investigated the electrochemical properties of gallium (III) sulfide (Ga2S3) at 30 °C. Ga2S3 shows two sloping plateaus in the potential range between 0.01 V and 2.0 V vs. (Li/Li+). The specific capacity of the Ga2S3 electrode in the first delithiation is ca. 920 mAh g-1, which corresponds to 81% of the theoretical capacity (assuming a 10-electron reaction). The capacity in the 10th cycle is 63% of the initial capacity. Ex situ X-ray diffraction and X-ray absorption fine structure analyses revealed that the reaction of the Ga2S3 electrode proceeds in two steps: Ga2S3 + 6Li+ + 6e - 2Ga + 3Li2S and Ga + xLi+ + xe- LixGa.

本文言語英語
ページ(範囲)5631-5636
ページ数6
ジャーナルJournal of Power Sources
196
13
DOI
出版ステータス出版済み - 7 1 2011
外部発表はい

All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

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