Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
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Volume 75, Issue 3
Displaying 1-11 of 11 articles from this issue
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Preface
Communication
Articles
  • Capacitance Enhancement of Aqueous EDLC Systems by Electrochemical Treatment
    Toshiharu SHIMOOKA, Shigeaki YAMAZAKI, Tatsuya SUGIMOTO, Tetsuya JYOZU ...
    2007 Volume 75 Issue 3 Pages 273-279
    Published: March 05, 2007
    Released on J-STAGE: March 20, 2012
    DOIhttps://doi.org/10.5796/electrochemistry.75.273
    JOURNAL FREE ACCESS
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    The electrochemical treatment of activated carbon electrodes has been investigated as a novel method enhancing the capacitance of electric double layer capacitor (EDLC) electrodes. The treatment at 0.7 V floating in a week at 70°C can be applied to EDLC with aqueous electrolytes. In 30 wt% H2SO4/H2O electrolyte, the treatment causes a capacitance increase in a low voltage region: 0–0.4 V. On the other hand, in 3.5 M NaBr/H2O electrolyte, it results in a remarkable capacitance increase of 2.4 times in a high voltage region: 0.4–1.0 V. These results suggest that the treatment mechanisms in the above electrolyte systems should be different. We report herein the origins and mechanisms of these capacitance increases.
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