Amorphous niobium sulfides as novel positive-electrode materials

Atsushi Sakuda, Noboru Taguchi, Tomonari Takeuchi, Hironori Kobayashi, Hikari Sakaebe, Kuniaki Tatsumi, Zempachi Ogumi

研究成果: Contribution to journalArticle査読

25 被引用数 (Scopus)

抄録

Novel high-capacity electrode materials are required to increase the energy density of lithium-ion batteries. Metal polysulfides, MSx (x > 2), are plausible candidates for such materials, whose high capacities are owed to multielectron processes. Hence, we mechanochemically synthesized novel amorphous niobium sulfides (NbS3, NbS4, and NbS 5) at room temperature. The cells fabricated using amorphous NbS 3, NbS4, and NbS5 showed high initial discharge capacities of 281, 446, and 596 mAh g-1, corresponding to 2.0, 3.7, and 5.6 electron processes per formula unit, respectively. Remarkably, the cells using a carbonate-based electrolyte showed reversible high-capacity charging and discharging.

本文言語英語
ページ(範囲)A79-A81
ジャーナルECS Electrochemistry Letters
3
7
DOI
出版ステータス出版済み - 1 1 2014
外部発表はい

All Science Journal Classification (ASJC) codes

  • 燃料技術
  • 電気化学
  • 材料化学

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