Anodic deposition of porous RuO2 on stainless steel for supercapacitor studies at high current densities
| Autor: | Sujit K. Mondal, N. Munichandraiah |
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| Rok vydání: | 2008 |
| Předmět: |
Supercapacitor
Electrolysis of water Renewable Energy Sustainability and the Environment Chemistry Analytical chemistry Oxygen evolution Energy Engineering and Power Technology Capacitance Ruthenium oxide Anode Electrical and Electronic Engineering Physical and Theoretical Chemistry Cyclic voltammetry Current density |
| Zdroj: | Journal of Power Sources. 175:657-663 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2007.08.104 |
| Popis: | Ruthenium dioxide is deposited on stainless steel (SS) substrate by galvanostatic oxidation of Ru3+. At high current densities employed for this purpose, there is oxidation of water to oxygen, which occurs in parallel with Ru3+ oxidation. The oxygen evolution consumes a major portion of the charge. The oxygen evolution generates a high porosity to RuO2 films, which is evident from scanning electron microscopy studies. RuO2 is identified by X-ray photoelectron spectroscopy. Cyclic voltammetry and galvanostatic charge–discharge cycling studies indicate that RuO2/SS electrodes possess good capacitance properties. Specific capacitance of 276 F g−1 is obtained at current densities as high as 20 mA cm−2 (13.33 A g−1). Porous nature of RuO2 facilitates passing of high currents during charge–discharge cycling. RuO2/SS electrodes are thus useful for high power supercapacitor applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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