Capacitive property studies of inexpensive SILAR synthesized polyaniline thin films for supercapacitor application

Abstract

The polyaniline (PANI) is an eco-friendly conductive polymer which has been considered for diverse applications. The partially oxidized phase of the PANI is useful for the charge storage application. Here, a unique nanograin/nanofiber structured PANI was grown on inexpensive stainless steel (SS) current collector by the simple oxidative polymerization process and its charge storage properties were systematically investigated. For that, the inexpensive successive ionic layer adsorption reaction method was used to grow a uniform nanostructured PANI on the SS conductor. This evolution of the nanostructure was studied with the Field emission scanning electron microscope. Furthermore, the as-prepared PANI was confirmed by the X-ray diffraction and the Fourier-transform infrared spectroscopy. In the half cell electrochemical testing, the prepared PANI exhibited a maximum specific capacitance of 710 F g −1 with a specific discharge capacity of 119 mAh −1 at 0.2 mA cm −2 in 1 M H 2 SO 4 for the supercapacitor application. Also, by using the power-law relation it was observed that, in a charging and a discharging current, initially a contribution of the diffusive faradaic reactions is more as compared with the surface capacitive non-faradaic reactions.

Pulsed Electrodeposition of Ultrathin Polyaniline Films and Mechanistic Understanding of their Anion-Mediated Electrochemical Behavior

“…[35][36][37][38][39] Although recent work has improved upon standard homogeneous chemical oxidation to provide improved thickness control of PANI, this approach still only provides about ∼1 μm thickness resolution, and results in porous and fibrous films. 44,45 Without a means to precisely control the film thickness of electrodeposited PANI, prior reports have been unable to investigate how the nanoscale thickness of the PANI film impacts the electrochemical mechanisms it undergoes.…”

Taguchi Optimization of Water Savonius Turbine for Low-Velocity Inlets Using CFD Approach

“…Energy demands are mainly fulfilled by burning fossil fuels, such as coal, oil and natural gas [1]. The most significant issue is that fossil fuel resources are limited.…”

Electrochemical studies of Ni(OH) 2 , NiO, and Ni 3 S 2 nanostructures on Ni‐foam toward binder‐free positive electrode for hybrid supercapacitor application

“…[6][7][8] Typically, RuO 2 , MnO 2 , WO 3 , Co(OH) 2 , and polyaniline have been widely recognized as pseudocapacitive SC electrode materials. [9][10][11][12][13] The nanostructure and electrode design also have an evident effect on charge storage and charge transfer kinetics in both EDL and pseudocapacitive electrode materials for higher SC performance. 4,5,[9][10][11][12][13] Different nanostructured materials have been investigated for SC application in recent years.…”

“…[9][10][11][12][13] The nanostructure and electrode design also have an evident effect on charge storage and charge transfer kinetics in both EDL and pseudocapacitive electrode materials for higher SC performance. 4,5,[9][10][11][12][13] Different nanostructured materials have been investigated for SC application in recent years. These studies involved gravimetric comparison of charge storage among different active materials.…”

“…However, an SC electrode made of pseudocapacitive material can store and retrieve electric charges in kinetically faster chemical redox reactions at the electrode surface over a broad potential range resulting in high energy density than the EDL electrode during SC operation 6‐8 . Typically, RuO 2 , MnO 2 , WO 3 , Co(OH) 2 , and polyaniline have been widely recognized as pseudocapacitive SC electrode materials 9‐13 . The nanostructure and electrode design also have an evident effect on charge storage and charge transfer kinetics in both EDL and pseudocapacitive electrode materials for higher SC performance 4,5,9‐13 …”