Porous Graphene Sheets as Positive Electrode Material for Supercapacitor - Battery Hybrid Energy Storage Devices

摘要

Porous graphene (PG) based positive supercapacitor electrode for hybrid supercapacitor - battery energy storage device has been fabricated successfully and studied in 1M A1C1_3 electrolyte for the first time. PG was prepared by simple and easy reduction and activation process by focusing solar light on acid treated graphene oxide (a-GO) film. This material exhibits electric double layer capacitance (EDLC) performance and high specific capacitance of 270.1 F/g at 2 A/g current density as well as high rate capability. This porous graphene based positive supercapacitor electrode in Al~(3+) based electrolyte can be commercialised in near future for high energy and power densities hybrid energy storage device.