Manganese oxide nanorod-graphene/vanadium oxide nanowire-graphene binder-free paper electrodes for metal oxide hybrid supercapacitors

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• 作者：Sanjaya D. Perera ; Mark Rudolph ; Ruperto G. Mariano ; Nour Nijem ; John P. Ferraris ; Yves J Chabal ; Kenneth J. Balkus Jr.
• 关键词：Graphene ; Binder free composite paper electrodes ; Flexible electrodes ; Supercapacitors ; Vanadium oxide nanowires ; Manganese oxide nanorods)
• 刊名：Nano Energy
• 出版年：September, 2013
• 年：2013
• 卷：2
• 期：5
• 页码：966-975
• 全文大小：6471 K

文摘

In this study MnO₂ nanorodes (MNR) were fabricated on reduced graphene oxide (rGO) sheets using a facile hydrothermal synthesis route. As prepared binder free MNR-rGO electrodes exhibited promising electrochemical performance. A similar approach was employed to prepare V₂O₅ nanowire (VNW) on rGO electrodes as anodes for supercapacitor applications. The VNW-rGO anode and MNR-rGO cathode were combined to form a novel hybrid supercapacitor. The hybrid supercapacitor exhibited excellent electrochemical performance reflecting the synergistic effect of combining the MNR-rGO electrode and VNW-rGO electrode. This novel hybrid supercapacitor delivered an energy density of ~15 W h/kg with a specific capacitance of 36.9 F/g. These results suggest that the binder free flexible MNR-rGO electrode is a promising cathode material for asymmetric supercapacitors and also for hybrid devices, which incorporate metal oxide anodes.