| 초록 |
Recently, the electrochemical properties of Co-Ni oxide have been studied for supercapacitor electrode materials because they have high capacitance value and their preparation method is easier and cheaper than other metal oxides such as RuOx. In the present study, in order to increase electrochemical properties of Co-Ni oxide as an electrode material for supercapacitor, the composite electrodes consisting of Co-Ni oxide and vapor-grown carbon fiber(VGCF) were prepared by thermal decomposition of nickel and cobalt nitrates and their electrochemical properties such as electrochmical reversibility, capacitance value, and cycle life were invetigated by means of cyclic voltammetry and impedence spectroscopy in 1M KOH aqueous solution.The high conductivity of VGCF is believed to play a favorable role for even a relatively high loading of Co-Ni oxide over its surface and this composite is expected to show better high rate performance, which is difficult to achieve in activated carbon-based composites. The details on the Co-Ni oxide/VGCF will be reported and discussed as a supercapacitor electrode. |
