In this work, conductive polymers, i.e., polyaniline (PANI) and its copolymers with polypyrrole (PPy), polythiophene (PTh), and poly (3,4-ethylenedioxythiophene) (PEDOT) were synthesized following chemical oxidative polymerization methods and used in the construction of supercapacitor devices. These conductive copolymers were characterized by structural (FTIR, XRD), morphological (FESEM), electrochemical (CV and GCD), and impedance spectroscopy studies. The PANI-PPy copolymer showed higher sp. capacitance of 420 F/g and cyclic capacitive retention of 97.8% compared to the other copolymers. Additionally, Tafel extrapolation studies demonstrated that the PANI-PEDOT had the lowest corrosion rate. To further assess performance, asymmetric supercapacitor devices (ASDs) were fabricated using prepared materials. GCD analysis demonstrated that the PANI-PTh//AC device achieved a sp. capacitance of 81 F/g and power density of 550 W/kg, while the PANI-PPy//AC device exhibited a capacitance of 69 F/g. PANI-PTh//AC device shows superior performance over other electrode configurations.