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Deposition of Carbon Nanowall Flowers on Two-Dimensional Sheet for Electrochemical Capacitor Application

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ELECTROCHEMICAL AND SOLID STATE LETTERS
卷 12, 期 6, 页码 K41-K44

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ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.3099325

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capacitance; carbon; electrochemical electrodes; nanofabrication; nanostructured materials; plasma CVD

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We have used bias-assisted microwave plasma chemical vapor deposition to synthesize (i) two-dimensional carbon nanowalls [(2D CNWs), monolayer] and (ii) three-dimensional carbon nanowalls [(3D CNWs), double-layer] on carbon cloth in a CH4/CO2 system. The specific surface area of the 3D CNW electrode (1580 m(2)/g) was considerably larger than that of the 2D CNW electrode (364 m(2)/g). This higher surface area and more porous structure of the 3D CNW electrode resulted in its capacitance reaching as high as ca. 198 F/g at a scan rate of 10 mV/s. Electrochemical measurements suggested that this 3D electrode is a promising material for application in electrical storage devices.

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