Preparation and electrochemical properties of nickel foam loaded NiMoO4/NiMoS4 composites
Using nickel foam as a substrate,NiMoO4 active materials with sheet-like structures were produced in situ,and later NiMoO4/NiMoS4 composites were prepared by vulcanization.On the morphology and electrochemical char-acteristics of the materials,the impacts of hydrothermal time and thiourea addition were examined.Electrochemical experiments revealed that the NiMoO4/NiMoS4 electrode could release a specific capacitance of 1 560.7 F·g-1 at a current density of 1 A·g-1,and the capacity remained at 76.7％of the initial specific capacitance after 2 000 cycles at a current density of 40 A·g-1.The asymmetric supercapacitors(ASC)device assembled with NiMoO4/NiMoS4 elec-trode material and activated carbon(AC)as positive and negative electrodes respectively can provide 29.0 Wh·kg-1 energy density at a power density of 400 W·kg-1.
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