Supercapacitor performance of crumpled and planar graphene materials produced by hydrogen gas reduction of graphene oxide

The conversion of crumpled graphene materials to planar graphene sheets was performed through hydrogen gas treatment of graphene oxide at various temperatures. The resulting graphene materials were incorporated into supercapacitors and systematically examined. Up to 500 degrees C, a monotonically increasing relationship between the specific capacitance and treatment temperature was identified.