Abstract: The invention provides a method for preparing a carbon composite, the method comprising the step of heating a mixture of graphene oxide and an active material, such as a carbon active material, such as activated carbon, at a temperature in the range 200 to 650° C., such as about 300° C. Also provided is the carbon composite obtained or obtainable from the method. The carbon composition may be provided on a backing plate, such as an electrically conductive backing plate. The carbon composite may be a component, such as the electrode, of a capacitor, such as a supercapacitor, and also provided are methods for charging and discharging the supercapacitor comprising the carbon composite.