Investigation on energy storage and conversion properties of multifunctional PANI-MWCNT composite. (5th April 2018)

• Record Type: Journal Article
• Authors: Roy, Atanu; Ray, Apurba; Saha, Samik; Das, Sachindranath
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 14(2018)
• Page Start: 7128
• Page End: 7139
• Publication Date: 2018-04-05
• Subjects: Hydrogen evolution reaction (HER) -- PANI-MWCNT -- Supercapacitor -- Water splitting; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.02.153
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Polyaniline-multiwalled carbon nanotube (PANI-MWCNT) composite synthesized through chemical polymerization is investigated as a possible electrode material for supercapacitor as well as an electro-catalyst for hydrogen evolution reaction (HER) in acidic medium. UV–Vis spectroscopy, FTIR spectroscopy and field emission scanning electron microscopy (FESEM) have been used to characterize the electrode material. The binder-free electrodes were prepared and they exhibit a specific capacitance of 540.29 F g −1 at a scan rate of 2 mV s −1 in 1 M H2 SO4 electrolyte. The material exhibits excellent pseudocapacitive behaviour due to the presence of PANI with long-term cyclic stability of 87.4% retention after 5000 cycles. PANI-MWCNT composite also shows good HER activity, with overpotential of −395 mV. Highlights: Supercapacitive and electro-catalytic performances of PANI-MWCNT have been studied. Optimum loading of MWCNT in PANI has been found for the best performance. Highest specific capacitance of 540.29 F g −1 was obtained with long term stability. Metal-free composite shows good HER activity, with overpotential of −395 mV.