Supercritical fluid deposition of vanadium oxide on multi-walled carbon nanotube buckypaper for supercapacitor electrode application
Do, Quyet Huu; Zeng, Changchun; Zhang, Chuck; Wang, Ben; Zheng, Jim; Do, Quyet Huu; High Performance Materials Institute, Florida State University, Tallahassee, FL 32310, USA ; Department of Industrial and Manufacturing Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, USA; Zeng, Changchun; High Performance Materials Institute, Florida State University, Tallahassee, FL 32310, USA ; Department of Industrial and Manufacturing Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, USA; Zhang, Chuck; High Performance Materials Institute, Florida State University, Tallahassee, FL 32310, USA ; Department of Industrial and Manufacturing Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, USA; Wang, Ben; High Performance Materials Institute, Florida State University, Tallahassee, FL 32310, USA ; Department of Industrial and Manufacturing Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, USA; Zheng, Jim; Department of Electrical and Computer and Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, USA
Журнал:
Nanotechnology
Дата:
2011-09-07
Аннотация:
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<sup> − 1</sup>, which was independent of the oxide material loading (up to 6.92 wt%) and voltage scan rate (up to 100 mV s<sup> − 1</sup>). The highest specific electrode capacitance achieved was ∼ 85 F g<sup> − 1</sup>, which was almost four times that of the pristine buckypaper electrode.
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