Enhanced activity of chemically synthesized hybrid graphene oxide/Mn3O4 composite for high performance supercapacitors

► Layer by layer assembly of graphene oxide and Mn3O4 layers. ► Porous morphology of GO/Mn3O4 hybrid nano-composite. ► GO/Mn3O4 hybrid composite provides less ESR and IR drop, has good stability. ► GO/Mn3O4 hybrid composite shows high power and energy density.