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

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 −1 and 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.