摘要
The supercapacitive performances of Co(OH)<sub>2sub>/Ni(OH)<sub>2sub> 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)<sub>2sub>/Ni(OH)<sub>2sub> composites different to that of the pure components shows that weight ratio of Co(OH)<sub>2sub>/Ni(OH)<sub>2sub> 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)<sub>2sub> electrode, exhibiting improved long-life cyclability.