Preparation and Application of Polyaniline Doped with Different Sulfonic Acids for Supercapacitor

Abstract

Polyaniline (PANI) nanomaterials doped with three different sulfonic acid surfactants (perfluorinated sulfonic acid ion exchange resin (Nafion), sodium dodecyl sulfate (SDS), and sodium dodecyl benzene sulfonate (SDBS)) were prepared using an emulsion polymerization method with manganese dioxide (MnO2) as the oxidant. The structure and morphology of the products were studied by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). Symmetric redox supercapacitor was assembled with doped PANI as the active electrode material. The electrochemical performances of the materials were evaluated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge-discharge tests. These results suggest that the introduction of surfactant is beneficial for the formation of a fiber structure and increases the dispersion of PANI. A PANI-Nafion network with distributed porosity and average diameters of 30-40 nm is obtained. The specific capacitances of PANI-Nafion, PANI-SDS, and PANI-SDBS electrodes at 0.1 A•g -1 are 385.3, 359.7, and 401.6 F•g -1 , respectively. Among these electrodes PANI-Nafion delivers the best cycle performance, maintaining 70.7% of its initial capacitance after 1000 cycles.

Polyaniline Synthesized by Different Dopants for Fluorene Detection via Photoluminescence Spectroscopy

“…The main conductive polymers, such as p-phenylenevinylene (PPV), polypyrrole (PPy) and polyaniline (PANI), are being applied in many areas, including photothermal therapy, electromagnetic interference shielding, photovoltaic cell, storage battery, membrane gas separation, microwave absorption, chemical sensors and anti-corrosion coating [ 7 , 8 , 9 , 10 ]. Some of their advantages include improved interface qualities, suitability for the production of lightweight devices, affordability and high productivity [ 10 , 11 ]. In polymerization, a plain organic synthesis technique must be applied to achieve a repeatable macromolecular design.…”

One-Pot Electrodeposition of a PANI:PSS/MWCNT Nanocomposite on Carbon Paper for Scalable Determination of Ascorbic Acid

“…The opposing charges of the nitrogen containing groups in aniline and the sulfonic acid groups of the PSS results in the groups having close proximity after deposition, with the sulfonic acid readily providing protons to preserve the doped, conductive emeraldine salt state of PANI, even in neutral solution. 58 The addition of the extra charged sulfonic acid groups in PSS also increases the hydrophilicity of the film. Neat PANI is quite nonpolar and struggles to achieve full contact with aqueous solutions.…”