Abstract
Abstract Thin-film ruthenium oxide electrodes are prepared by cathodic electrodeposition on a titanium substrate. Different deposition periods are used to obtain different film thicknesses. The electrodes are used to form a supercapacitor with a 0.5 M H 2 SO 4 electrolyte. The specific capacitance and charge–discharge periods are found to be dependent on the electrode thickness. A maximum specific capacitance of 788 F g −1 is achieved with an electrode thickness of 0.0014 g cm −2 . These results are explained by considering the morphological changes that take place with increasing film thickness.
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