Title :
Life expectancy and degradation behavior of electric double layer capacitor part I
Author :
Umemura, T. ; Mizutani, Y. ; Okamoto, T. ; Taguchi, T. ; Nakajima, K. ; Tanaka, K.
Author_Institution :
Power & Ind. Syst. R & D Center, Toshiba Corp., Yokohama, Japan
Abstract :
General properties of various electric double layer capacitors (EDLC) have been introduced for power and industrial application. In this report, degradation behavior of the EDLCs was clarified. The capacitance decrease might be caused by the degradation of the electrolysis, propylene carbonate, and also the degradation by-products which piled on the nano-scale micro-cavity surface of the activated-carbon particles of the electrodes. The degradation mechanism was found to be governed by the Arrhenius chemical kinetics theory and consisted of two stages with different activation energy.
Keywords :
capacitance; electrochemical electrodes; electrolysis; electrolytic capacitors; microcavities; power capacitors; reaction kinetics; Arrhenius chemical kinetics theory; activation energy; capacitance; carbon particles; degradation behavior; electric double layer capacitor; electrodes; electrolysis; nanoscale microcavity surface; power applications; propylene carbonate; Batteries; Capacitance; Control systems; Degradation; Electrical equipment industry; Power engineering and energy; Power system control; Power systems; Supercapacitors; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on
Print_ISBN :
0-7803-7725-7
DOI :
10.1109/ICPADM.2003.1218577
