Fabrication and electrochemical characterization of graphene-oxide supercapacitor electrodes with activated carbon current collectors on graphite substrates

•Activated carbon was evaluated as a current collector for graphene oxide supercapacitor electrodes.•An all carbon supercapacitor device was fabricated with graphene oxide electrodes, activated carbon current collectors, and graphite substrates.•The all carbon supercapacitor was electrochemically characterized and evaluated.