Performance of supercapacitor with electrodeposited ruthenium oxide film electrodes—effect of film thickness

• Published in: Journal of power sources Vol. 134; no. 1; pp. 148 - 152
• Main Authors: Park, Bong-Ok, Lokhande, C.D, Park, Hyung-Sang, Jung, Kwang-Deog, Joo, Oh-Shim
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 12.07.2004; Elsevier Sequoia
• Subjects: Applied sciences; Capacitors. Resistors. Filters; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrodeposition; Energy; Energy. Thermal use of fuels; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; Fuel cells; Morphology; Ruthenium oxide; Supercapacitor; Thin-film electrode; Various equipment and components; Ruthenium oxide; Supercapacitor; Electrodeposition; Thin-film electrode; Morphology; Titanium; Capacitance; Secondary cell; Performance; Discharge charge cycle; Fuel cell; Thin film
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2004.02.027

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 2SO 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.