Facile fabrication of hierarchical Co3O4@MoO2 nanosheet arrays used as pseudocapacitive electrode materials.

Uniform Co 3 O 4 @MoO 2 nanosheet arrays is fabricated through hydrothermal and electrodeposition method by virtue of the chemical-etching method. The electrochemical measurements show that the specific capacitance of 600 F g −1 at a scan rate of 2 mV s −1 for the Co 3 O 4 @MoO 2 hybrid is higher than both pristine MoO 2 and Co 3 O 4 . Moreover, the hybrid electrode with low resistance displays good cyclic stability of 83% retention after 1000-cycle charge/discharge. These results indicate that the as-prepared Co 3 O 4 @MoO 2 hybrid is a potential candidate used as electrode material in supercapacitors. [ABSTRACT FROM AUTHOR]