Abstract
In the synthesis of intrinsic conducting polymers (ICPs) via in-situ oxidative polymerization, the amount and nature of oxidizing agent effectively determine the morphology and electrochemical properties. However, the qualitative and quantitative role of oxidants over the electrochemical properties of in-situ synthesized polypyrrole (PPy) were rarely studied. In this context, PPy was synthesized via in-situ chemical oxidative polymerization method with varying concentrations of oxidizing agents, viz. ammonium persulfate (APS) and ferric chloride (FeCl3). It was observed that APS leads to the synthesis of smaller PPy particles. PPy synthesized with 2 M APS (PA-2) exhibited the highest specific capacitance of 152.35 F g−1 at the current density of 1 A g−1 and 130.53 F g−1 at a scan rate of 100 mV s−1. The material also showed capacitance retention of 81.4% after 2000 cycles. Enhance properties of PA-2 have been ascribed to uniform growth and small particle size, which facilitate ion diffusion through the material.
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