Amorphous Metal Polysulfides: Electrode Materials with Unique Insertion/Extraction Reactions

Atsushi Sakuda, Koji Ohara, Katsutoshi Fukuda, Koji Nakanishi, Tomoya Kawaguchi, Hajime Arai, Yoshiharu Uchimoto, Toshiaki Ohta, Eiichiro Matsubara, Zempachi Ogumi, Toyoki Okumura, Hironori Kobayashi, Hiroyuki Kageyama, Masahiro Shikano, Hikari Sakaebe, Tomonari Takeuchi

研究成果: ジャーナルへの寄稿学術誌査読

63 被引用数 (Scopus)

抄録

A unique charge/discharge mechanism of amorphous TiS4 is reported. Amorphous transition metal polysulfide electrodes exhibit anomalous charge/discharge performance and should have a unique charge/discharge mechanism: neither the typical intercalation/deintercalation mechanism nor the conversion-type one, but a mixture of the two. Analyzing the mechanism of such electrodes has been a challenge because fewer tools are available to examine the "amorphous" structure. It is revealed that the electrode undergoes two distinct structural changes: (i) the deformation and formation of S-S disulfide bonds and (ii) changes in the coordination number of titanium. These structural changes proceed continuously and concertedly for Li insertion/extraction. The results of this study provide a novel and unique model of amorphous electrode materials with significantly larger capacities.

本文言語英語
ページ(範囲)8796-8799
ページ数4
ジャーナルJournal of the American Chemical Society
139
26
DOI
出版ステータス出版済み - 7月 5 2017
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 触媒
  • 化学 (全般)
  • 生化学
  • コロイド化学および表面化学

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