Preparation and Supercapacitor Properties of Manganese Molybdenum Polyoxometalate Composite Materials Based on Glassy Carbon Electrodes
Supercapacitor is a new type of green energy storage device.Electrode material is the most important component of supercapacitor.Polyoxometalate has the characteristics of reversible and rapid electron transfer,low cost and electron sponge.The composite electrode material was prepared by mixing it with acetylene black and graphene oxide and loaded on the surface of glassy carbon electrode to investigate the supercapacitor properties.The results show that when the mass ratio of polyoxometalate to acetylene black is 1:1,the graphene oxide concentration is 3 mg/mL,the mixture volume is 20 μL and the current density is 0.5 A·g-1,the charge and discharge time of material can reach 135s,the specific capacitance is 33.61 F·g-1 and the capacitance retention rate can still reach 97.6％after 1000 cycles of constant current charge and dis-charge.It shows that the composite electrode material has good supercapacitor properties.
万方数据
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