Reversibility-increasing technique of the electric double layer capacitor by latex particles

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420920
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Energy engineering
• Research Institution: University of Fukui
• Principal Investigator: CHEN Jingyuan 福井大学, 工学(系)研究科(研究院), 准教授 (50311676)
• Co-Investigator(Kenkyū-buntansha): AOKI Koichi 福井大学, 大学院工学研究科, 名誉教授 (80142264) ; NISHIUMI Toyohiko 福井大学, 大学院工学研究科, 准教授 (10377476)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 電気二重層キャパシタ / 交流インピーダンス / ラテックス微粒子 / 静電容量の周波数依存性 / 酸化グラフェン片 / 水素イオン / Gouy-Chapman理論 / 電気二重層構造

Outline of Final Research Achievements

Our results in the electric double layer capacitors useful for designs of supercapacitors are following: 1) the double layer capacitance is proportional to a power of the ac frequency, 2) the double-layer impedance includes a resistance component with a frequency dependence, 3) the capacitance is independent of DC power potentials, of salt concentration and of type of salt, 4) the capacitance is determined by the effective polarization of the solvent dipoles oriented on the electrode, 4) the Gouy-Chapman theory is invalid for the practically used ionic concentrations, 5) the powers for the frequency dependence belongs to a cooperative phenomenon with respective to the orientation of dipoles.

Free Research Field

分析化学