The carbon and nickel oxide/carbon composite electrodes were prepared by plasma jet and magnetron sput-tering techniques. The investigations were performed to evaluate the influence of the Ar/C2H2 ratio on the specific capacitance values of carbon and NiO/carbon electrodes. The obtained electrodes were investigated by scanning electron microscopy, Raman scattering spectroscopy (RS), and X-ray diffraction techniques. The surface of the carbon electrodes became less porous and more homogenous with increasing Ar/C2H2. The RS results indicated that the fraction of the sp2 carbon sites increased with increasing Ar/C2H2 ratio. The increase of the Ar/C2H2 ratio increased the capacitance values from 0.73 up to 3.8 F/g. Meanwhile, after the deposition of the nickel oxide on the carbon, the capacitance increased ten and more times and varied in the range of 7.6-86.1 F/g.
参考文献
| [1] | R. Kotz;M. Carlen .Principles and applications of electrochemical capacitors[J].Electrochimica Acta,2000(15/16):2483-2498. |
| [2] | Y.-L. Tai;H. Teng .Modification of porous carbon with nickel oxide impregnation to enhance the electrochemical capacitance and conductivity[J].Carbon: An International Journal Sponsored by the American Carbon Society,2004(11):2335-2338. |
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