One-step depositing method of PAni/MnO2 composites for enhanced supercapacitor performance

Manganese dioxide (MnO2) is extensively used in supercapacitors, but its poor conductivity and low power density limit its applications. This study employed a one-step electrochemical deposition method to fabricate a polyaniline (PAni)/MnO2/carbon cloth (CC) composite electrode, which was assembled into flexible super- capacitors. Optimal process parameters were determined through exploring the effect of deposition durations on the electrochemical performance. With optimized synergistic effects between the components, the PAni/MnO2@CC composite electrode exhibits high specific capacitance of 1,694.25 mF cm- 2 at 1 mA cm- 2 , which is remarkably better than that of PAni@CC, MnO2@CC, and other reported PAni-based electrodes. The assembled supercapacitor displays high energy density, superior bending performance, and good cycle stability. This easy-to-prepare composite electrode, with excellent energy storage capability, offers significant potential for flexible energy storage devices.