Porous MnO2 for use in a high performance supercapacitor: replication of a 3D graphene network as a reactive template†
Abstract
Graphene oxide hydrogel is used as a reactive template to prepare nanoporous materials with a 3D microstructure. The as-prepared porous MnO2 shows a capacitance retention of ā¼70.6% at a current density as high as 15 A gā1, resulting from the 3D interconnected ion transport channel replicated from the graphene oxide hydrogel.