Effect of Particle Size on Iron-Phthalocyanine Cathodes in Secondary Lithium Cells

Shigeto Okada, Jun ichi Yamaki

研究成果: Contribution to journalArticle査読

8 被引用数 (Scopus)

抄録

To overcome small capacities at high discharge rates in Li/iron-phthalocyanine (FePc) secondary cells, the effect of particle size on FePc is investigated. Large particle FePc is obtained by sublimation and gas evaporation is used to prepare FePc ultrafine particles. The discharge capacity at 0.1 mA/cm2 increases with increasing particle size (ultrafine particles < starting powders < single crystals). The relatively low discharge capacity of ultrafine particles at low discharge rate may be due to the low crystallinity. The order of discharge capacity, however, is reversed at high discharge rates over 0.3 mA/cm2. This tendency is consistent with the result of Li diffusivity measurements. The large discharge capacity of ultrafine particles at high discharge rates must be a product of the large surface area. From these results, ultrafine FePc particles are found to be a good organic cathode material at high discharge rates.

本文言語英語
ページ(範囲)2437-2440
ページ数4
ジャーナルJournal of the Electrochemical Society
136
9
DOI
出版ステータス出版済み - 9 1989
外部発表はい

All Science Journal Classification (ASJC) codes

  • 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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