Charge storage in the PANI-α-MnO2polymer-nanocomposite system

• Main Authors: Izan Izwan, Misnon, Rajan, Jose
• Format: Conference or Workshop Item
• Language: English; English
• Published: Elsevier Ltd 2021
• Subjects: HD Industries. Land use. Labor; Q Science (General); T Technology (General)
• Online Access: http://umpir.ump.edu.my/id/eprint/35619/1/Charge%20storage%20in%20the%20PANI-%CE%B1-MnO2polymer-nanocomposite%20system.pdf; http://umpir.ump.edu.my/id/eprint/35619/2/Charge%20storage%20in%20the%20PANI-%CE%B1-MnO2polymer-nanocomposite%20system_Abs.pdf; http://umpir.ump.edu.my/id/eprint/35619/; https://doi.org/10.1016/j.matpr.2020.05.235

Supercapacitors (SCs) store electrochemical energy with high specific power, faster charge response, and long cycle life at an electrode-electrolyte interface; however, with lower specific energy than commercial batteries. In this article, structural, morphological, surface and electrochemical properties of a polymer-nanocomposite in the PANI-α-MnO2 system has been systematically investigated. The α-MnO2was synthesized by molten salt methods and the polymeric composite was developed by in-situ polymerization. The materials were characterized by thermal analyses, X-ray and electron diffraction, FTIR spectroscopy, gas adsorption studies, scanning and transmission electron microscopy. The electrochemical properties of the materials before and after PANI modification are studied in 6 M KOH aqueous electrolyte employing cyclic voltammetry, galvanostatic charge-discharge cycling, and electrochemical impedance spectroscopy. A difference in charge storage mechanism from pseudocapacitive type to battery-type was observed upon PANI modification and the corresponding charge storage and charge kinetic parameters have been detailed.