Synthesis of graphene wrapped porous CoMoO4 nanospheres as high-performance anodes for rechargeable lithium-ion batteries

Abstract

Herein, we described a facile method to synthesise porous CoMoO₄ nanospheres wrapped with graphene (CoMoO₄@G). The porous CoMoO₄@G composites were generated from the calcination treatment of CoMo precursors, followed by a graphene-coating process. Compared with pristine CoMoO₄ porous spheres, the graphene sheets endowed the CoMoO₄@G with higher electrical conductivity and structural stability. When used as an anode materials for lithium-ion batteries (LIBs), the CoMoO₄@G electrode delivers a high initial specific capacity (1355.8 mA h g⁻¹ at 100 mA g⁻¹), good cycling stability (783 mA h g⁻¹ over 150 cycles at 500 mA g⁻¹) and excellent rate capacity (697.7 mA h g⁻¹ at 2000 mA g⁻¹). In view of this, the combination of the graphene sheets with CoMoO₄ nanospheres serve as potential anode materials for application in the new generation of LIBs.