Construction of Hierarchical Ni(OH)₂@CoMoO₄ Nanoflake Composite for High-Performance Supercapacitors

Abstract

Hierarchical Ni(OH) 2 @CoMoO 4 nanoflake composite on Ni foam was successfully constructed by electrodepositing Ni(OH) 2 onto CoMoO 4 nanoflake and investigated as binder-free electrodes for supercapacitor. The composite shows a large areal capacitance of 5.23[Formula: see text]F[Formula: see text]cm[Formula: see text] at current density of 8[Formula: see text]mA[Formula: see text]cm[Formula: see text], and a capacitance retention of 82.5% after 1000 cycles. The high electrochemical performances can be attributed to the hierarchical nanoflakes structure and the synergetic effect between Ni(OH) 2 nanosheets and CoMoO 4 nanoflakes. This work demonstrates that Ni(OH) 2 @CoMoO 4 nanoflake composite is highly desirable for application as advanced electrochemical electrode material.