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首页> 外文期刊>Journal of power sources >Electrochemical profile of nano-particle CoAl double hydroxide/active carbon supercapacitor using KOH electrolyte solution
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Electrochemical profile of nano-particle CoAl double hydroxide/active carbon supercapacitor using KOH electrolyte solution

机译：KOH电解液对纳米CoAl双氢氧化物/活性炭超级电容器的电化学性能

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摘要

A nano-stmctured CoAl double hydroxide with an average particle size of 60-70 nm was prepared by a chemical co-precipitation. It was used as a positive electrode for the asymmetric hybrid supercapacitor in combination with an active carbon negative electrode in KOH electrolyte solution. The electrochemical capacitance performance of this kind of hybrid supercapacitor was investigated by means of cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge tests. A specific capacitance of 77Fg~(-1) with a specific energy density of 15.5 whkg~(-1) was obtained for the hybrid supercapacitor within the voltage range of 0.9-1.5 V. The supercapacitor also exhibits a good cycling performance and keep 90 percent of initial capacity over 1000 cycles.
机译：通过化学共沉淀制备平均粒径为60-70 nm的纳米结构CoAl双氢氧化物。在KOH电解液中，它与活性炭负极一起用作不对称混合超级电容器的正极。通过循环伏安法，电化学阻抗谱和恒电流充放电试验研究了这种混合型超级电容器的电化学电容性能。在0.9-1.5 V的电压范围内，混合超级电容器获得的比电容为77Fg〜（-1），比能量密度为15.5 Whkg〜（-1）。该超级电容器还具有良好的循环性能并保持90 1000次循环中初始容量的百分比。

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