MnOx/carbon nanotube/reduced graphene oxide nanohybrids as high-performance supercapacitor electrodes

• DOI: 10.1038/am.2014.100
• Publication Date: 2014-10-31T06:59:40Z
• Authors: Zhao Jun Han; Dong Han Seo; Samuel Yick; Jun Hong Chen; Kostya Ostrikov
• Keywords: Graphite oxide; Nanomaterials; Carbon fibers

Nanohybrids consisting of both carbon and pseudocapacitive metal oxides are promising as high-performance electrodes to meet the key energy power requirements supercapacitors. However, development nanohybrids with controllable size, density, composition morphology remains a formidable challenge. Here, we present simple robust approach integrating manganese oxide (MnOx) nanoparticles onto flexible graphite paper using an ultrathin nanotube/reduced graphene (CNT/RGO) supporting layer. Supercapacitor employing MnOx/CNT/RGO without any conductive additives or binders yield specific capacitance 1070 F g−1 at 10 mV s−1, which is among highest values reported for range hybrid structures close theoretical capacity MnOx. Moreover, atmospheric-pressure plasmas used functionalize CNT/RGO layer improve adhesion MnOx nanoparticles, results in theimproved cycling stability nanohybrid electrodes. These provide information utilization plasma-related effects synergistically enhance performance supercapacitors may create new opportunities areas such catalysts, photosynthesis electrochemical sensors. Researchers have discovered how triple storage by flower-like nanoparticles. Carbon-based nanomaterials widely supercapacitor because their surfaces can hold release charges quickly. But densities, group collaborators based Australia USA led Kostya (Ken) Ostrikov, principal contribution Zhao Jun Han investigated ways combine oxide, compound exceptional capacitance. They developed support —a film nanotubes reduced on — that could control thickness electrodeposited Experiments revealed certain porous, nanostructures dramatically boosted supercapacitance fixing firmly enhancing adsorption surface ions. Predeposition plasma treatments also helped electrode adhere together better charge stability. This work reports integrate yielded high The was further improved through functionalizing plasmas, demonstrating synergistic use enhanced device performance.