کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1284576 | 1498023 | 2012 | 6 صفحه PDF | دانلود رایگان |
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.
► The supercapacitive performances of Co(OH)2/Ni(OH)2 composite electrodes were investigated in 1 M LiOH solution.
► The weight ratio in the Co(OH)2/Ni(OH)2 composite electrodes has great influence on their capacitive behavior.
► The capacitance retention ratio increases from 41.6% (pure Ni(OH)2 electrode) to 88.2% (Co(OH)2/Ni(OH)2 composite electrode with weight ratio of 2/3) after 1000 continuous charge/discharge cycles.
Journal: Journal of Power Sources - Volume 209, 1 July 2012, Pages 141–146