NiMoO4/Eu6MoO12 composite on foam Ni as electrode material for supercapacitors

Abstract

By a one-step hydrothermal reaction, NiMoO4/Eu6MoO12 composite supported on nickel foam was successfully synthesized. The properties of the composite were optimized by adjusting the content of europium nitrate in the reactants. The NiMoO4 nanorods array formed on nickel foam was used as structural support, and Eu6MoO12 nanoparticles were added to the surface, increasing the material's specific surface area and the active site.The two chemicals' combined effect made the electrode reaction more reversible. In addition, Eu with variable oxidation states increased the oxygen vacancy and promoted the Faraday reaction. And the formation of Eu6MoO12 also significantly reduced the charge transfer resistance of the composite, it influenced the electrochemical behavior of materials. Electrochemical experiments show that the specific capacity of NiMoO4/Eu6MoO12 is 1184.0 C g−1 at 1 A/g. The energy density of NiMoO4/Eu6MoO12//AC device is 22.34 W h kg−1 when the power density is 749.52 W kg−1. In addition, the device also has a capacity retention rate of 80.2% after 5000 cycles. The material's superior electrochemical performance demonstrates that it has promising future applications in the realm of energy storage.