Synthesis and Characterization of Supercapacitor Electrode Materials Based on Carbon Fiber Materials and Metal Oxyhydroxides
- 9 Downloads
Composite materials (CMs) based on activated carbon fiber material (ACFM) modified with oxygen-containing transition metal compounds (MnO2, Ni(OH)2, and Co(OH)2) by using colloid electrophoresis are studied. All prepared CMs have higher capacitance than the individual parental materials, with the CM ACFM–Ni(OH)2 exhibiting the maximum capacitance (~380 F g–1). Changes in the capacitances of ACFM and prepared ACFM-based CMs induced by potential cycling, the time of exposure to electrolyte solution, and potential scan rate are investigated. The capacitances of all CMs are found to increase with the number of cycles, but tend to decrease at higher potential scan rates.
Keywordselectrophoresis activated carbon fiber material manganese oxide nickel hydroxide cobalt hydroxide
Unable to display preview. Download preview PDF.
- 2.Fan, Z., Chen, J., Sun, F., Xu, Y., and Kuang, Y., Preparation and capacitive properties of cobalt-nickel oxides/carbon nanotube composites, Electrochimica Acta, 2007, vol. 91, pp. 50–57.Google Scholar
- 5.Butyrin, G.M., Vysokoporistye uglerodnye materialy (High-Porous Carbon Materials), Moscow: Khimiya, 1976.Google Scholar
- 13.Zamyatin, A.P. and Bek, R.Yu., About some regularities of metal distribution in depth of volume-flow porous electrode, Elektrokhimiya, 1980, vol. 16, no. 9, pp. 1316–1321.Google Scholar
- 16.Zemskova, L.A., Modified carbon fibers: Sorbents, electrode materials, and catalysts, Vestn. Dal’nevost. Otd., Ross. Akad. Nauk, 2009, no. 9, pp. 39–52.Google Scholar
- 20.Tarasevich, M.R., Elektrokhimiya uglerodnykh materialov (Electrochemistry of Carbon Materials), Moscow: Nauka, 1984.Google Scholar