Capacitance Enhancement of Aqueous EDLC Systems by Electrochemical Treatment

• SHIMOOKA Toshiharu

  Department of Applied Chemistry, Faculty of Engineering, Kansai University

• YAMAZAKI Shigeaki

  Department of Applied Chemistry, Faculty of Engineering, Kansai University

• SUGIMOTO Tatsuya

  Department of Applied Chemistry, Faculty of Engineering, Kansai University

• JYOZUKA Tetsuya

  Department of Applied Chemistry, Faculty of Engineering, Kansai University

• TERAISHI Hisao

  Department of Applied Chemistry, Faculty of Engineering, Kansai University

• NAGAO Yasutaka

  Organization for Research and Development of Innovative Science and Technology, Kansai University

• ODA Hirokazu

  Department of Chemical Engineering, Faculty of Engineering, Kansai University

• MATSUDA Yoshiharu

  Organization for Research and Development of Innovative Science and Technology, Kansai University Kensei Inc.

• ISHIKAWA Masashi

  Department of Applied Chemistry, Faculty of Engineering, Kansai University Research Center for Business Academia Collaboration, Kansai University

Bibliographic Information

Other Title

• 電気化学処理による水溶液電気二重層キャパシタの高容量化
• デンキ カガク ショリ ニ ヨル スイヨウエキ デンキ ニジュウソウ キャパシタ ノ コウヨウリョウカ

Abstract

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.

Journal

• Electrochemistry

  Electrochemistry 75 (3), 273-279, 2007

  The Electrochemical Society of Japan

Keywords

• EDLC
• Activated Carbon Fiber
• Aqueous Electrolyte
• Electrochemical Treatment

Details

• CRID: 1390001206496930048
• NII Article ID: 10018294893
• NII Book ID: AN00151637
• DOI: 10.5796/electrochemistry.75.273
• COI: 1:CAS:528:DC%2BD2sXislKrtrc%3D
• ISSN: 21862451
• ISSN: 13443542
• NDL BIB ID: 8731688
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8731688
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/75/3/75_3_273/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Allowed