Facile construction of novel CoMoO4 microplates@CoMoO4 microprisms structures for well-stable supercapacitors

A simple and controllable strategy has been developed to fabricate CoMoO_4 microplates/CoMoO_4 microprisms(CMCMs) structures on Ni foam via a facile, cost-effective, two-step hydrothermal route. The as-grown 3D architecture exhibited excellent areal capacitance of 4.33 F cm~(-2)at a galvanostatic chargedischarge current density of 50 mA cm~(-2)(6 Ag~(-1)) and outstanding cycle performance with only 2.8%degradation over 6500 cycles in the 3 M KOH solution. The asymmetric all-solid-state supercapacitors based on activated carbon(AC) and CMCMs exhibited much better electrochemical performance than the symmetric counterpart, showing an areal capacitance of 95.22 mF cm~(-2)at the current density of 12 m A cm~(-2)and excellent cycling stability with 92.27% of the initial capacitance after 5000 cycles. These results may provide useful guidelines for materials selection and configuration designs for the novel energy storage devices based on Co Mo O4 components and substrates.