電気二重層キャパシタの劣化要因に関する考察

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2014/10/01

タイトル(英語): Study on Deterioration Factors of an Electric Double-layer Capacitor

著者名: 吉玉　拓（宮崎大学大学院農学工学総合研究科），春田　篤二（宮崎大学大学院工学研究科），田島　大輔（宮崎大学IR推進機構），迫田　達也（宮崎大学工学教育研究部電気システム工学科），林　則行（宮崎大学工学教育研究部電気システム工学科）

著者名(英語): Hiromu Yoshitama (Interdisciplinary Graduate Schools of Agriculture and Engineering, University of Miyazaki), Atsuji Haruta (Graduate School of Engineering, University of Miyazaki), Daisuke Tashima (Interdisciplinary Research Organization, University of Miyazaki), Tatsuya Sakoda (University of Miyazaki), Noriyuki Hayashi (University of Miyazaki)

キーワード: 電気二重層キャパシタ，劣化要因，分析　　electric double-layer capacitors，deterioration factor，analysis

要約(英語): Electric double-layer capacitors (EDLCs) have the advantages of much longer life and unnecessary maintenance. However, for EDLCs used for a long period, a decrease of electrostatic capacity and an increase in internal resistance are recognized. In this study, in order to clarify the factors responsible for the deterioration of EDLCs used for a long period, chemical analysis was conducted on each component such as an activated carbon electrode and an electrolytes solution. The obtained data were compared with those from a new EDLC. The results showed that long-term use reduced electrostatic capacity about 5% and made internal resistance increase by about 1.7 times. The quantity of oxygen due to surface functional groups of the activated carbon electrode was confirmed using electron spectroscopy for chemical analysis (ESCA). As compared with results obtained from a new EDLC, long-term use made the ratio of O-C=O deriving from carboxyl group (-COOH) to C-C increase 1.2 times. The ratio of C-O deriving from hydroxyl group (-OH) to C-C also increased 1.4 times. In addition, it was found that BET surface area decreased about 40% and that pores whose diameter was in the range between 0.8 to 20 nm disappeared.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.134 No.10 （2014）

本誌掲載ページ: 525-531 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/134/10/134_525/_article/-char/ja/