In the present work,it was studied that nano-sized NiO electrodes doping with C and Co were pre-pared by electrochemical deposition in an ethanol solution containing nickel nitrate and cobalt nitrate and sintering processes.The capacitance performance of such electrodes was also studied.The results reveal that samples obtained by electrochemical depostition first on a porous nickel cathode in an ethanol solution first on a porous nicket cathode in an ethanol solution contain 0.5 mol/L nitrates,in which Ni(NO3)2 and Co(NO3)2 were mixed in a molar proportion of 8:2.After sintering at 300℃ for 2h,they exhibited the best perform-ance.XRD analysis illustrates that the essential phase of the product is NiO doping with certain content of C and Co. The particles of product imaged a spherical morphology with sizes of 20—30 nm in diameter,and with an average crystal size of 4—5 nm.The capacitance measurement of the simu-lating C/NiO capactors indicates that a single electrode can reach as high as 410.0 F/g,and still maintain the value of 323 F/g after 30 recycles showed as a stabilized value with in-creasing recycles,when it was discharged at a current of 5 mA. In the present work, it was studied that nano-sized NiO electrodes doping with C and Co were pre-pared by electrochemical deposition in an ethanol solution containing nickel nitrate and cobalt nitrate and sintering processes. The capacitance performance of such electrodes was also studied. The results reveal that samples obtained by electrochemical depostration on a porous nickel cathode in an ethanol solution first on a porous nicket cathode in an ethanol solution containing 0.5 mol / L nitrates, in which Ni (NO3) 2 and Co (NO3) 2 were mixed in a molar proportion of 8: 2.After sintering at 300 ° C for 2h, they exhibited the best perform-ance. XRD analysis showed that the essential phase of the product is NiO doping with certain content of C and Co. The particles of product imaged a spherical morphology with sizes of 20-30 nm in diameter, and with an average crystal size of 4-5 nm. The capacitance measurement of the simu-lating C / NiO capactors indicates that a single electrode can reach as high as 410.0 F / g, and still maintain the value of 323 F / g after 30 recycles showed as a stabilized value with in-creasing recycles, when it was discharged at a current of 5 mA.