Supercritical fluid deposition of vanadium oxide on multi-walled carbon nanotube buckypaper for supercapacitor electrode application |
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Authors: | Do Quyet Huu Zeng Changchun Zhang Chuck Wang Ben Zheng Jim |
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Affiliation: | High Performance Materials Institute, Florida State University, Tallahassee, FL 32310, USA. |
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Abstract: | Composite electrodes were fabricated for supercapacitor applications by depositing vanadium oxide onto multi-walled carbon nanotube (MWCNT) buckypaper using supercritical fluid deposition (SFD). The deposited thin vanadium oxide layer showed amorphous structure with excellent uniformity. In aqueous KCl electrolyte, the vanadium oxide exhibited a constant pseudo-capacitance of ~ 1024 F g(-1), which was independent of the oxide material loading (up to 6.92 wt%) and voltage scan rate (up to 100 mV s(-1)). The highest specific electrode capacitance achieved was ~ 85 F g(-1), which was almost four times that of the pristine buckypaper electrode. |
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