Influences of Residual Water in High Specific Surface Area Carbon on the Capacitor Performances in an Organic Electrolyte Solution
| Autor: | Takashi Utsunomiya, Kenta Fujii, Masayuki Morita, Masahiro Tokita, Yuya Noguchi, Nobuko Yoshimoto |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
020209 energy General Chemical Engineering Inorganic chemistry chemistry.chemical_element 02 engineering and technology Electrolyte Internal resistance Electric double-layer capacitor 021001 nanoscience & nanotechnology Capacitance Solvent chemistry Specific surface area 0202 electrical engineering electronic engineering information engineering Electrochemistry medicine 0210 nano-technology Carbon Activated carbon medicine.drug |
| Zdroj: | Electrochimica Acta. 206:427-431 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2015.11.056 |
| Popis: | Charge-discharge behavior of an electric double-layer capacitor consisting of conventional activated carbon electrodes with an organic electrolyte solution have been investigated as a function of the amount of residual water in the carbon. The water contents in the carbon powder were estimated by the titration of the released water in acetonitrile solvent by assuming adsorption-distribution equilibrium between the solid carbon and the organic solvent phases. The residual water in the carbon much influenced the capacitor performances, especially in the cycling with high-rate or high-voltage floating. The constant-current cycling at higher current rates decreased the specific capacitance and increased the internal resistance for the electrodes containing higher amounts of residual water. The degradation behavior was more significantly observed for the electrode containing more water when the charge-discharge cycling was accompanied by high-voltage floating. |
| Databáze: | OpenAIRE |
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