Capacitive properties of RuO2 and Ru-Co mixed oxide deposited on single-walled carbon nanotubes for high-performance supercapacitors
Composite electrodes for use in redox supercapacitors were prepared by electrochemical deposition of RuO2or 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 (∼620 F g−1) at low potential scan rates (10 mV s−1). However, at higher scan rates (500 mV s−1) the mixed metal oxide electrode showed superior performance (570 F g−1) when compared to the RuO2 electrode (475 F g−1). This increase in capacitance at high scan rates is attributed to the role of the Co in providing enhanced electronic conduction.
Additional Grant Number
Please refer to publisher version or contact your library.