Capacitive properties of RuO2 and Ru–Co mixed oxide deposited on single-wal…

a b s t r a c t Composite electrodes for use in redox supercapacitors were prepared by electrochemical deposition of RuO2 or the co-deposition of Ru–Co mixed oxides on the surface of single-walled carbon nanotubes. Electrodes coated with the Ru–Co mixed oxide [Ru (13.13 wt%) and Co (2.89 wt%)] or RuO2, exhibited a similar specific capacitance (∼620Fg−1) at low potential scan rates (…