Preparation and Supercapacitor Performance of CoO@CuOElectrode Materials

Abstract

Abstract: Supercapacitors have attracted attentions due to many advantages,such as ultra-high power density,fast and stable charge/discharge rate,long cycle life and so on.CoO is regarded as a promising electrode of supercapacitor,the theoretical specific capacity reaches 4 292 F·g^-1,but its low conductivity and volume expansion during charge/discharge process lead to very low actual specific capacity than the theoretical specific capacity.In order to solve these problems,CuO nanowire arrays were firstly grown on copper foams via the thermal oxidation method.And then,hierarchical CoO was successfully deposited on CuO nanowires by chemical bath deposition,thus,core-shell CoO@CuO electrode materials were obtained.This electrode materials have an excellent specific capacity of 1.043 0 F·cm^-2 (117.145 3 F·g^-1) at the current density of 2 mA·cm^-2,as well as a good capacitance retention rate,which increase the number of surface active sites,reduce the effect of CoO volume expansion.

Key words: capacitance property, copper oxide, cobalt oxide, nanowire array, supercapacitor, electrode material, core-shell structure

CLC Number:

TM53

WU Tong, GU Qingyu, WANG Peijian, LIU Zhongpin, SUN Haibin. Preparation and Supercapacitor Performance of CoO@CuOElectrode Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(1): 317-322.

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