Preparation of Concentric Circular Planar Flexible Capacitor by Screen Printing Method and Its Electrochemical Energy Storage Performance
Great progress has been made in the research of flexible micro-plane supercapacitors ( MPSCs) .Howev-er,due to its lowenergy density,it still cannot meet the application requirements of wearable electronic devices.The inertia of Graphene limits its activity as a supercapacitor electrode.Therefore,this paper modified Graphene by 60 Coγ-ray irradiation,then compounded it with the pseudocapacitive electrode material transition metal carbide ( MXene) .With the help of screen printing method,a concentric circular planar capacitor with composite modified electrodes was prepared on a flexible fabric substrate.The results show that,according to Raman,the defects of Graphene modified with 60 Coγ-ray irradiation increase,resulting to the increase of specific surface area and porosi-ty.The planar capacitor prepared after recombination with MXene has a high area specific capacitance and energy density (119 mF/cm2 and 20 µWh/cm2 ) .When the planar capacitor is charged and discharged for 5000 cycles,the capacitance retention rate is 102％,which exhibits excellent cycle life and mechanical stability and has poten-tial applications in the field of micro-flexible electronic devices and energy storage facilities.
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维普
