High performance hybrid supercapacitor based on two nanostructured conducting polymers: Self-doped polyaniline and polypyrrole nanofibers

摘要: Abstract A hybrid asymmetric electrochemical supercapacitor is constructed by employing two different nanostructured conducting polymers of polypyrrole (PPy) and self-doped polyaniline (SDPA). Different methods, including cyclic voltammetry, galvanostatic charge–discharge impedance spectroscopy (EIS), are performed to characterize the performance supercapacitor. The maximal working potential window 1.3 V associated with more than 97 F g−1 total electrode materials. cell maintains approximately 70% its initial capacitance after 1000 cycles an equivalent series resistance (ESR) below 1.6 Ω cm2. Furthermore, system shows high specific energy, power maximum values 22.87 Wh kg−1, 570 W kg−1 45,193 W kg−1, respectively, at a current density 5 mA cm−2 in 1 M KCl. Long-life cycling achieved removing dissolved oxygen using mild pH electrolyte, which limits redox activity electrically (ECPs). Moreover, proposed exhibits retention 89% higher (40 mA cm−2), indicating good stability rate capability. has been compared other symmetric cells.