An Approach to Optimize the Composition of Supercapacitor Electrodes Consisting of Manganese-Molybdenum Mixed Oxide and Carbon Nanotubes
| Autor: | Keigo Okamura, Ryota Inoue, Thomas Sebille, Masaharu Nakayama, Kazuaki Tomono |
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| Rok vydání: | 2011 |
| Předmět: |
Supercapacitor
Materials science Renewable Energy Sustainability and the Environment Oxide Nanotechnology Carbon nanotube Condensed Matter Physics Electrochemistry Capacitance Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound Electrophoretic deposition Chemical engineering chemistry law Electrode Materials Chemistry Mixed oxide |
| Zdroj: | Journal of The Electrochemical Society. 158:A711-A717 |
| ISSN: | 1945-7111 0013-4651 |
| DOI: | 10.1149/1.3578039 |
| Popis: | We have fabricated composite electrode materials consisting of manganese-molybdenum mixed oxide and carbon nanotubes (CNTs) for supercapacitor application. The process involves electrophoretic deposition (EPD) of multi-walled CNTs onto an ITO electrode, followed by anodic deposition of Mn-Mo oxide from an aqueous Mn(II) solution containing MoO4 2− anions. Electrochemical properties of the composite electrodes with various combinations of Mn-Mo oxide and CNTs were evaluated systematically with the aim of maximizing the electrochemical utilization of the oxide. Optimization led to a high specific capacitance of 408 F g−1 at a scan rate of 2 mV s−1, with an area-normalized capacitance of 31 mF cm−2 (or a volume-normalized capacitance of 76 F cm−3). |
| Databáze: | OpenAIRE |
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