Redox Capacitor Properties of Indole Derivatives-Electrochemical Characteristics and Long-Term Cycleability of Cyclic Indole Trimer

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  • MACHIDA Kenji
    Center of Future Nanomaterials Science, lnstitute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology
  • TAKENOUCHI Hideaki
    Center of Future Nanomaterials Science, lnstitute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology
  • HIRAKI Remi
    Center of Future Nanomaterials Science, lnstitute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology
  • NAOI Katsuhiko
    Center of Future Nanomaterials Science, lnstitute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology

Bibliographic Information

Other Title
  • インドール類のレドックスキャパシタ特性I—高サイクル性サイクリックインドールトリマーの電気化学特性
  • インドール類のレドックスキャパシタ特性1--高サイクル性サイクリックインドールトリマーの電気化学特性
  • インドールルイ ノ レドックスキャパシタ トクセイ 1 コウサイクルセイ サイクリックインドールトリマー ノ デンキ カガク トクセイ

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Abstract

<p>A cyclic indole trimer (CIT) was studied electrochemically and was proposed as a new category of redox capacitor electrode material. ln a sulfuric acid aqueous media, the CIT electrode showed electrochemical redox activity at wide potential window between 0 and 1V vs. Ag/AgCl. The wide redox system is attributed to two redox couples, anion doping/undoping with electron transfer and proton undoping/doping. Specific capacity obtained for the CIT electrode was 55 Ah kg－1(198 Fg－1), which is three times higher than that for the polyindole (21 Ah kg－1). More importantly, the CIT electrode maintained its high capacity of 52 Ah kg－1 (187 Fg－1) after 100,000 cycling, while the capacity decreased down to 5 Ah kg－1 for the polyindole electrode.</p>

Journal

  • Electrochemistry

    Electrochemistry 73 (7), 489-495, 2005-07-05

    The Electrochemical Society of Japan

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