<p>The need for powerful energy storage systems is rising. Supercapacitors are a highly appropriate approach for fulfilling the needs related to energy storage. They have better qualities than batteries, such as more energy per unit than ordinary capacitors, greater power density levels, and better cycle stability. These benefits make them appropriate for smaller-scale applications in macro-to-micro devices utilized for compact electrical components, as well as for large-scale devices needing higher energy and power density. Because of its intrinsic qualities, conducting polymers—a recently identified material—have drawn attention from scientists studying energy storage. Metal oxides are frequently added to conducting polymers to provide them improved or unique properties for usage in supercapacitors. Our study presents a unique approach to making and analyzing Polyaniline–lead oxide (PANI–Pb₃O₄) composites at a lower cost. To the best of our knowledge, the electrochemical characteristics of the PANI– Pb₃O₄ composite have been comparatively less explored, and this study aims to provide further insights into their potential for supercapacitor applications. In the present study, a straightforward, new one-step approach has been demonstrated for the synthesis of Polyaniline (PANI), a conducting polymer&#xa0;that is utilized to make composites with Pb₃O₄ with different weight % for supercapacitor applications. The prepared solid composites were characterized for structural, morphological, and electrochemical behavior. The electrochemical features of PANI and PANI–Pb₃O₄ composites are examined using cyclic voltage measurements, galvanostatic charges and discharges, and spectroscopy of electrochemical impedance. The obtained specific capacitance of 548 F g⁻¹ at 1 A g⁻¹ from PANI: Pb₃O₄ = 95:5 is comparable with metal oxide/conducting polymers like PANI/GO and PANI/TiO₂.</p>