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Supercapacitive properties of a nanowire-structured MnO2 electrode in the gel electrolyte containing silica |
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| Authors: | Ho-Seong Nam Jae Sung Kwon Jang Myoun Ko Jong-Duk Kim |
| Affiliation: | a Hanwha Chemical R&D Center, Daejeon 305-804, South Korea b Department of Chemical & Biomolecular Engineering, Center for Ultramicrochemical Process System, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, South Korea c Department of Applied Chemistry & Biotechnology, Hanbat National University, San 16-1, Duckmyung-dong, Yusong-gu, Daejeon 305-719, South Korea d Research Team of Power Control Devices, Electronics & Telecommunications Research Institute (ETRI), Daejeon 305-700, South Korea |
| Abstract: | Nanowire-structured MnO2 active materials were prepared by a chemical precipitation method and their supercapacitive properties for use in the electrodes of supercapacitors were investigated by means of cyclic voltammetry in an aqueous gel electrolytes consisting of 1 M Na2SO4 and fumed silica (SiO2). The MnO2 electrode showed a maximum specific capacitance of 151 F g−1 after 1000 cycles at 100 mV s−1 when using the gel electrolyte containing 3 wt.% of SiO2, which is higher than 121 F g−1 obtained when using the 1 M Na2SO4 liquid electrolyte alone. |
| Keywords: | MnO2 Nanowire SiO2 Gel electrolyte Supercapacitor |
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