The supercapacitive performances of Co(OH)2/Ni(OH)2 composites in lithium hydroxide solution: Selection of electrolyte and effect of weight ratio
- 作者：Linghao Su ; qauslh@163.com ; Liangyu Gong ; Jinglong Gao
- 关键词：Cobalt hydroxide ; Nickel hydroxide ; Composite ; Supercapacitor ; Lithium hydroxide ; Electrolyte
- 刊名：Journal of Power Sources
- 出版年：2012
- 期刊代码：58_03787753
- 类别：ce
- 出版时间：1 July, 2012
- 卷：209
- 期：Complete
- 页码：141-146
- 文件大小：817 K
摘要
The supercapacitive performances of Co(OH)2/Ni(OH)2 composites in lithium hydroxide solution are investigated in detail. Cyclic voltammetries and galvanostatic charge/discharge measurements reveal that LiOH is the most suitable electrolyte for the composite electrodes among MOH (M = Li, Na and K). The redox behavior of the Co(OH)2/Ni(OH)2 composites different to that of the pure components shows that weight ratio of Co(OH)2/Ni(OH)2 exerts a great influence on the capacitive performances. After 1000 continuous charge/discharge cycles, the capacitance retention ratio for the composite electrode with the weight ratio of 2/3 is elevated from 41.6%to 88.2%compared with pure Ni(OH)2 electrode, exhibiting improved long-life cyclability.