Carbon Blacks as Cathode Materials for Rechargeable Lithium Cells

Akira Watanabe, Kunio Mori, Hideki Ishikawa, Yashiro Nakamura

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1318-1321
Number of pages4
JournalJournal of the Electrochemical Society
Volume134
Issue number6
DOIs
Publication statusPublished - 1987 Jun
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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