Synthesis and application of CuO and CuAl۲O۴ hollow sphere structures as active electrodematerials in supercapacitors

In this study, two hollow sphere structures, CuO and CuAl۲O۴, were synthesized and theirsupercapacitor behavior was investigated by cyclic voltammetry and galvanostatic charge-discharge methods.The obtained capacitance was ۲۱۰ and ۱۶۰ F g-۱ for CuAl۲O۴ and CuO in a three electrode system and at ۱ A g-۱current density, respectively. Also, CuAl۲O۴ showed ۲۴.۷ Wh kg-۱ and ۷۰۰ W kg-۱ energy and power density, inasymmetric supercapacitor respectively. After ۳۰۰۰ charge and discharge cycles, ۷۸.۱% of the initial capacitanceof the device was maintained

کلیدواژه ها:

Supercapacitor ، Energy storage ، Pseudocapacitor ، Energy density ، Power density