On the cycle behavior of various graphitic negative electrodes in a propylene carbonate-based electrolyte for lithium ion batteries

Minato Egashira, Shigeto Okada, Jun ichi Yamaki

研究成果: ジャーナルへの寄稿学術誌査読

7 被引用数 (Scopus)

抄録

We investigated the negative electrode behaviors of several mesocarbon microbeads (MCMB) heat-treated over 2000 °C in 1M LiPF 6/propylene carbonate (PC) electrolyte under various charge-discharge current densities. A higher current density provided improved (a highly graphitized MCMB)/Li cell cycle stability as lower graphitized MCMB electrode was used. In addition, two pre-cycles at a higher current density also provided better cycle stability in subsequent cycles at a lower current density. For example, MCMB 6μm in diameter and heat-treated at 2800 °C cycled stably at a current density of 0.2mA cm-2 after 2 pre-cycles at 0.5mA cm-2. A higher current density may provide an adequate surface film at the first charging.

本文言語英語
ページ(範囲)237-240
ページ数4
ジャーナルJournal of Power Sources
124
1
DOI
出版ステータス出版済み - 10月 1 2003

!!!All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

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