Controllable Synthesis of MnO₂-PANI Composite on Carbon Cloth and Its Asymmetric Supercapacitor

A facile two-step strategy was developed for synthesis of manganese dioxide (MnO₂)-poly-aniline (PANI) hybrid nanostructures on carbon cloth (CC). Asymmetric supercapacitor was assembled with MnO₂-PANI-CC ternary composite and carbon nanowires(CNWs)-CC as positive and negative electrodes, respectively. Structural characterizations and electrochemical performance of composites were eva-luated by Scanning Electron Microscope (SEM), Energy Disperse Spectroscopy (EDS), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Photoelectron Spectroscopy (XPS), Cyclic Voltammetry (CV), and galvanostatic Charge-Discharge (CD) techniques. Electrochemical performance results showed that the voltage range of MnO₂-PANI-CC//CNWs-CC asymmetric supercapacitor increased up to 1.6 V and the specific capacitance was 1.42 F/cm² at the scanning speed 5 mV/s. The energy density of MnO₂-PANI-CC//CNWs-CC can reach 31.2 W·h/kg at the power density 5 000 W/kg.