Anodic composite deposition of RuO2·xH2O–TiO2 for electrochemical supercapacitors

Abstract This communication demonstrates the first work on anodic composite deposition of oxide nanocomposites. Rutile TiO 2 nanoflowers with an average petal size of ca. 10 nm in diameter and 100 nm in length were synthesized from a TiCl 3 solution purged with air at 25 °C for 12 days prior to the composite deposition. Hydrous ruthenium oxide (RuO 2 · x H 2 O) and TiO 2 nanoflowers were composite-deposited onto Ti substrates for supercapacitors. In comparing with RuO 2 · x H 2 O deposits, RuO 2 · x H 2 O–TiO 2 nanocomposites with a highly porous nature exhibit the weakly mass-dependent specific capacitance and high-power capacitive characteristics.

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