This study presents polyaniline (PANI) synthesis and characterization by using a novel acid-assisted polymerization technique. Two PANI suspensions with different ammonium peroxydisulfate (APS) concentrations were synthesized at room temperature; i.e., the ratio of aniline to APS was 10:1 for PANI1 and 5:1 for PANI2. SEM measurements revealed distinct structures: a porous nanofibrillar structure for PANI1 and a densely packed structure for PANI2. The electrochemical performance of the fabricated PANI/glassy carbon (GC) electrodes was evaluated using a three-electrode cell configuration at scan rates of 10 and 30 mV/s. The PANI1/GC heterostructure exhibited a specific capacitance of 160 F/g, while this value increased to 407 F/g for the PANI2/GC. This research contributes not only to the understanding of PANI synthesis at room temperature but also to its potential applications in electrochemical energy storage devices.

Czech Technical University Prague Faculty of Electrical Engineering Technická 1902 2 Prague 6 166 27 Czech Republic

Institute of Macromolecular Chemistry AS CR Heyrovsky nam 2 Prague 6 162 00 Czech Republic

Institute of Physics of the Czech Academy of Sciences Cukrovarnická 10 Prague 6 162 00 Czech Republic

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