TY - GEN
T1 - Preparation and electrochemical capacitance of ruthenium oxide-titania nanotube composite
AU - Xie, Yibing
AU - Zhou, Li Min
AU - Huang, Chuanjun
AU - Liu, Yang
AU - Lu, Jian
PY - 2009/9/30
Y1 - 2009/9/30
N2 - A well-aligned titania nanotube array grown on titanium sheet was fabricated by an anodization process in hydrofluoric acid-phosphoric acid-ethylene glycol aqueous electrolyte. Electroactive ruthenium oxide was filled into independent titania nanotubes or deposited on the surface of planar titanium sheet by an electrodeposition-oxidation process. Electrochemical capacitances of these well-designed ruthenium oxides were investigated for supercapacitor applications. Accordingly, ruthenium oxide-titania/titanium (RuO2VTiO2/Ti) nanocomposite exhibits a much higher specific capacitance, power and energy density than ruthenium oxide/titanium (RuO2/Ti) in sulphate acid electrolyte. The utilization efficiency of RuO2is intensively improved by introducing a novel electrode substrate with a nanotube array structure. Such a superior performance of RuO2-TiO2/Ti nanocomposite is ascribed to its highly accessible reaction sites of well-tailored RuO2on TiO2nanotubes.
AB - A well-aligned titania nanotube array grown on titanium sheet was fabricated by an anodization process in hydrofluoric acid-phosphoric acid-ethylene glycol aqueous electrolyte. Electroactive ruthenium oxide was filled into independent titania nanotubes or deposited on the surface of planar titanium sheet by an electrodeposition-oxidation process. Electrochemical capacitances of these well-designed ruthenium oxides were investigated for supercapacitor applications. Accordingly, ruthenium oxide-titania/titanium (RuO2VTiO2/Ti) nanocomposite exhibits a much higher specific capacitance, power and energy density than ruthenium oxide/titanium (RuO2/Ti) in sulphate acid electrolyte. The utilization efficiency of RuO2is intensively improved by introducing a novel electrode substrate with a nanotube array structure. Such a superior performance of RuO2-TiO2/Ti nanocomposite is ascribed to its highly accessible reaction sites of well-tailored RuO2on TiO2nanotubes.
KW - Electrochemical capacitance
KW - Electrodeposition-oxidation synthesis
KW - Ruthenium oxide
KW - Titania nanotube array
UR - http://www.scopus.com/inward/record.url?scp=70349418548&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.614.235
DO - 10.4028/www.scientific.net/MSF.614.235
M3 - Conference article published in proceeding or book
SN - 0878493352
SN - 9780878493357
T3 - Materials Science Forum
SP - 235
EP - 241
BT - 6th International Forum on Advanced Material Science and Technology, IFAMST 2008
T2 - 6th International Forum on Advanced Material Science and Technology, IFAMST 2008
Y2 - 12 June 2008 through 14 June 2008
ER -