Three-dimensional CoMoO₄ nanorods/nanographene composites on a Ni coated macroporous electrically conductive network with excellent electrochemical performance

Nanostructured three-dimensional (3D) CoMoO₄ nanorods/nanographene composites were produced on a macroporous electrically conductive network (MECN). The nanographene with more defects serving as the active center enhances the conductivity and faradic charge transfer of the composite, and more, the porous 3D structure of the MECN increases the specific area, improves the mass loading of active materials, and enhances transport behaviors of ion and electron, leading to large specific capacity and excellent rate capability. The CoMoO₄/nanographene/MECN electrode has a capacity of 85.5 mA h/g (855 μA h cm⁻²) at a discharge current density of 1 A g⁻¹ (10 mA cm⁻²) and capacity loss of 13.6% after 5000 cycles. The hybrid device composed of CoMoO₄/nanographene/MECN ll AC/Ni-foam exhibits excellent capacities of 112.4 μW h cm⁻² and 5.62 mW h cm⁻³ at power densities of 675.5 μW cm⁻² and 33.78 mW cm⁻³, respectively, in addition to 74.4% capacity retention after 5000 cycles.