Activation of raw pitch coke with alkali hydroxide to prepare high performance carbon for electric double layer capacitor

Satoshi Mitani, Sang Ick Lee, Seong Ho Yoon, Yozo Korai, Isao Mochida

研究成果: Contribution to journalArticle査読

75 被引用数 (Scopus)

抄録

Powder of raw pitch coke was activated with alkali hydroxides at 500-900°C to prepare carbon electrode of high capacitance for electric double layer capacitor (EDLC). KOH provided very high surface area of 2320 m2/g at 800°C, while NaOH did moderate surface area of 1000 m2/g at 650-750°C. High surface area provided by KOH led to a high capacitance per weight of 39 F/g. However, its capacitance per volume was as low as 16 F/ml. Although the coke of moderate surface area activated with NaOH showed a similar capacitance per weight, its capacity per volume was as high as 28F/ml because of its high density. Adequate porosity must be selectively introduced by NaOH activation to the coke to obtain moderate surface area. Much smaller expansion of layers in the present needle type coke activated by NaOH than that by KOH is indicative for the higher density of the former activated coke.

本文言語英語
ページ(範囲)298-301
ページ数4
ジャーナルJournal of Power Sources
133
2
DOI
出版ステータス出版済み - 6 4 2004

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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