Carbon Blacks as Cathode Materials for Rechargeable Lithium Cells

Akira Watanabe, Kunio Mori, Hideki Ishikawa, Yashiro Nakamura

研究成果: Article査読

15 被引用数 (Scopus)

抄録

Various carbon blacks as cathode materials for rechargeable lithium cells were investigated. The charge capacity of lithium cells were approximately proportional to the surface area of carbon blacks. Ketjen black EC has the highest surface area (950 m2/g) and exhibited the highest discharge capacity (398 Ah/kg) in our experiments where cutoff potentials were 1.0V vs. Li/Li+ on discharge and 4.5V on charge. The Ketjen black EC cathode also showed good cycling characteristics at a constant capacity (50 Ah/kg). In contrast to this, acetylene black, which has higher crystalline structure and smaller surface area, exhibited a lower discharge capacity (6 Ah/kg). Such differences of features for various carbon black cathodes were clearly observed in cyclic voltammetry measurements. The cyclic voltammograms and the charge-discharge curves of carbon black cathodes suggested that some electrochemical reaction, such as doping and undoping of ions into the polyaromatic structure of carbon blacks, occurs in the charge-discharge cycling.

本文言語English
ページ(範囲)1318-1321
ページ数4
ジャーナルJournal of the Electrochemical Society
134
6
DOI
出版ステータスPublished - 1987 6
外部発表はい

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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