Electrochemical capacitance of nanocomposite films formed by loading carbon nanotubes with ruthenium oxide |
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| Affiliation: | 1. Eco-Nano Research Center, Korea Institute of Science and Technology (KIST), P.O. Box 131, Cheongryang, Seoul, Republic of Korea;2. Department of Chemical Engineering, University of Seoul, 90 Chonnong-dong, Tongdaemun-gu, Seoul, Republic of Korea;1. Department of Physics, Gulbarga University, Gulbarga 585106, India;2. Advanced Physics Laboratory, Department of Physics, Savitribai Phule Pune University, Pune 411007, India;3. National Defence Academy, Khadakwasla, Pune 411023, India;1. Institute of Nanoscience of Aragon, INA, Chemical and Environmental Engineering Department, University of Zaragoza, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain;2. Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain |
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| Abstract: | This work reports the supercapacitive properties of composite films of multiwalled carbon nanotubes (MWNT) and ruthenium oxide (RuO2). Transmission and scanning electron microscopy, cyclic voltammetry, and electrochemical studies revealed that the nanoporous three-dimensional arrangement of RuO2-coated MWNT in these films facilitated the improvement of electron and ion transfer relative to MWNT films. The capacitance was measured for films of different RuO2 loading, revealing specific capacitances per mass as high as 628 F g?1. The energy storage density of the electrode has increased about three times as compared to MWNT treated with piranha solution. |
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