Efficient Preparation of Gallic Acid‐Incorporated Polyaniline as an Electrode Material With Tunable Electrochemical Performance

ABSTRACT

As the demand for high‐performance energy storage devices continues to boom, the electrode materials with large specific capacitance and long‐term stability for supercapacitors have garnered significant attention. In this study, gallic acid (GA)‐incorporated polyaniline (GA/PANI) nanomaterials were prepared through in situ polymerization in different reaction temperatures and different feed proportions. The formation and physicochemical features of GA/PANI were certified by XRD, FTIR, UV‐Vis, and SEM analysis. The electrochemical analysis revealed an enhanced specific capacitance of 635 F g⁻¹ at 0.5 A g⁻¹and a capacitance retention of 96.0% after 10,000 cyclic voltammetry tests at a scan rate of 200 mV s⁻¹ for GA/PANI1:10. The assembled supercapacitor based on GA/PANI1:10 displays a high energy density of 49.2 Wh kg⁻¹ at a power density of 301 W kg⁻¹. Therefore, these results verified the suitability of GA/PANI nanomaterial as an electrode material for the practical application in supercapacitor with long‐term reliability and rate capacity.