Ethylene carbonate-based organic electrolytes for high performance aluminium electrolytic capacitors

被引:11
作者
Morita, M
Matsuda, Y
机构
[1] Dept. of Appl. Chem. and Chem. Eng., Faculty of Engineering, Yamaguchi University, Ube 755
关键词
aluminium; electrolytic capacitors; organic electrolytes; electrolytic conductivity;
D O I
10.1016/0378-7753(95)02280-5
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The utilization of ethylene carbonate (EC)-based solutions has been examined as the electrolyte of aluminium electrolytic capacitors. The electrolytic conductivities of alkylammonium salts in the solutions containing propylene carbonate (PC), gamma-butyrolactone (BL) or sulfolane (S) as a co-solvent varied with both the solvent composition and the ion size of the salt. The maximum conductivity of 0.5 M tetraethylammonium hydrogen maleate (TEAM), 9.8 x 10(-3) S cm(-1), was obtained in a 20 mol% EC + 80 mol% BL composition. The thermal stability of the electrolyte solution varied also with the electrolyte composition; the solutions containing higher mol% EC tended to be unstable towards thermal stimulation. The anodic behaviour of the formation of aluminium oxide was briefly examined in the EC-based electrolytes containing small amounts of water. The oxide films formed in the TEAM solutions were highly resistant to corrosion, suggesting that the present electrolyte system has a high ability for the oxide film restoration in the capacitor.
引用
收藏
页码:179 / 183
页数:5
相关论文
共 18 条