Crumpled nitrogen-doped graphene–ultrafine Mn3O4 nanohybrids and their application in supercapacitors

Abstract

Crumpled nitrogen-doped graphene–ultrafine Mn₃O₄ nanohybrids (CNGMNs) were synthesized through a one-step strategy under hydrothermal conditions for promising application as supercapacitor materials. Doping of N atoms in the lattice of graphene and anchoring of Mn₃O₄ nanoparticles on graphene sheets were achieved concomitantly during the process under the assistance of aniline. The specific capacitance of this nanostructured hybrid was nearly six times that of the Mn₃O₄ counterpart. Additionally, enhanced rate capability and cycling stability (∼98.7% retention after 2000 cycles) were also obtained. The facile approach to prepare CNGMNs and exceptional electrochemical properties indicate that the CNGMNs could be a promising candidate material for supercapacitors.