Polyaniline‐Acetylene black‐Copper cobaltite based ternary hybrid material with enhanced electrochemical properties and its use in supercapacitor electrodes

Abstract

A new system based on Polyaniline-Acetylene black-Copper cobaltite composite has been prepared and affirmed by XRD, UV, SEM, FTIR, and EDS characterizations. The rod-like texture of ternary hybrid system offered excellent electrochemical activity in comparison to single and binary systems. CV and CD results revealed outstanding redox behavior of the ternary hybrid electrodes. Ternary electrode (PACC) presented the highest specific capacitance value of 690 F/g at 1 mA/cm 2 current density. PACC electrode based symmetric supercapacitor had a specific capacitance of 137.25 Fg -1 at 1 mA/cm 2 of current density. PACC symmetric supercapacitor had the highest specific power and specific energy of 3308.85 W.kg -1 and 19.064 Wh.kg -1 , respectively. The ternary system provides less charge transfer resistance values compared to all other systems. Thermal stability of the ternary composite is way better than polyaniline, which is due to the contribution of copper cobaltite and acetylene black. The overwhelming characteristics of the ternary hybrid composite bring it to the limelight as an excellent candidate in the field of supercapacitors.

In Situ Aniline-Polymerized Interfaces on GO–PVA Nanoplatforms as Bifunctional Supercapacitors and pH-Universal ORR Electrodes

“…This behavior might be related to the fact that at these large currents the charge stored is mainly due to electrical double-layer charging, and the contribution from PANI is negligible. Composite capacitances are on the same order of magnitude, or even larger than the currently reported capacitances for PANI–GO-based composites. ,,,, Finally, the GO/PANI/PVA electrode was long-term-cycled at a current of 10 A·g –1 to evaluate the stability of this material (Figure D). The capacitance remained almost constant during the first 2500 cycles, showing a slight capacitance decrease up to the 10 000th cycle, at which 93% of the original capacitance was retained.…”

“…GO/PANI/PVA and rGO/PANI/PVA show reversible redox reactions in a potential window characteristic for PANI-based materials; − see Figure A,B. Both composites show a box-like electrochemical fingerprint with the contribution of the emeraldine/pernigraniline redox process, detected as current peaks close to 0.2 V. However, the measured currents for GO/PANI/PVA are considerably higher than those for rGO/PANI/PVA Figure S1 shows a comparison of CV of GO/PVA and rGO/PVA composites with GO/PANI/PVA and rGO/PANI/PVA.…”

“…Both composites show a box-like electrochemical fingerprint with the contribution of the emeraldine/pernigraniline redox process, detected as current peaks close to 0.2 V. However, the measured currents for GO/PANI/PVA are considerably higher than those for rGO/PANI/PVA. 46 Figure S1 shows a comparison of CV of GO/PVA and rGO/PVA composites with GO/PANI/PVA and rGO/PANI/PVA. The presence of PANI in the nanoplatforms is the source of the high capacitances measured.…”

Improvement of capacitive performance of polyaniline based hybrid supercapacitor

“…Conducting polymer composites demonstrate remarkable energy storage capacity due to its greater electrical conductivity, higher charge storage ability, mechanical properties, comparatively cheaper and ecofriendliness [5,6,7,8,9,10]. Electrodes prepared with conducting polymer can provide higher capacitance through rapid and reversible redox reaction [11,12,13,14].…”

Phosphotungstic acid‐Titania loaded polyaniline nanocomposite as efficient methanol electro‐oxidation catalyst in fuel cells

“…Over the past years, conducting polymer (polyaniline (PANI), polydiphenylamine (PDPA), poly (2, 5-dimethoxyaniline) (PDMA), and so on) has been widely utilized in numerous applications such as supercapacitors, sensors, energy storage devices, and batteries due to their physicochemical, mechanical, optical, and electrical properties. [9][10][11][12][13][14][15] Among the conducting polymers, PANI is the utmost vital conducting polymer because of its greater surface area, environmental stability, solubility, tunable electrical conductivity, and reversible redox behavior. [16][17][18][19] Therefore, PANI has an excellent conducting matrix to enhance the electro-catalytic activity has been reported by several papers.…”