Co3O4@MnMoO4 Nanorod Clusters as an Electrode Material for Superior Supercapacitors
Danfeng Cui, Yanfang Li, Yuankai Li, Yanyun Fan, Hongmei Chen, Hongyan Xu, Chenyang Xue
Abstract
Co 3 O 4 @MnMoO4 composites on nickel (Ni) foam were first synthesized by a two-step hydrothermal process and exhibited better electrochemical properties than pure Co 3 O 4 nanorod clusters according to the electrochemical test. The specific capacities of the Co 3 O 4 and Co 3 O 4 @MnMoO4 electrodes are 436 F·g -1 and 663.75 F·g -1 , respectively, at a current density of 2.5 mA cm -2 . After 3000 cycles, they Co 3 O 4 and Co 3 O 4 @ MnMoO 4 electrodes retain 100% and 95.32% of the initial specific capacities, respectively, at a current density of 3 A g -1 . The great capacitive property of Co 3 O 4 @MnMoO 4 composites is attributed to their specific area, which leads to a higher electron/ion-transfer rate, more electroactive reaction sites and larger electrolyte infiltrate area than Co 3 O 4 nanorod clusters.