Advanced Materials: TechConnect Briefs 2015Advanced Materials TechConnect Briefs 2015

Graphene Chapter 4

Manganese Oxide/Carbon Nanofibers-Embedded Graphene Sheets for Capacitors

K-J Ahn, H. Yoon
Chonnam National University, Korea

pp. 184 - 186

Keywords: graphene, carbon nanofibers, capacitors

We report the fabrication of a ternary nanoarchitecture consisting of manganese oxide (MnO), carbon nanofibers (CNFs), and reduced graphene oxide sheets and their application to supercapacitor electrodes. MnO nanoclusters-decorated CNFs (MCNFs) with diameters of about 50 nm were prepared via single-nozzle co-electrospinning. The MCNFs were readily embedded into graphene sheets via hydrophobic interaction in aqueous solution. Importantly, this straightforward synthesis process readily affords product on a scale of tens of grams. The embedded MCNFs prevent the irreversible aggregation of graphene sheets and allow an opened microstructure inside the nanoarchitectures.The capacitances were higher than those of control samples (only reduced graphene oxide or MCNFs), which was probably due to the synergistic effect of the individual components. Moreover, the graphene sheets separated by the MCNFs boost the electrochemical performance of the nanoarchitecture electrodes. These electrodes exhibit enhanced specific capacitances compared with a sheet electrode fabricated of MCNF-only or RGO-only.The capacitances were higher than those of control samples, which was probably due to the synergistic effect of the individual components. Moreover, the graphene sheets separated by the MCNFs boost the electrochemical performance of the nanoarchitecture electrodes. These electrodes exhibit enhanced specific capacitances compared with a sheet electrode fabricated of MCNF-only or RGO-only.