Electrodeposition of PANI/MnO₂ Composite on SnO₂/Ti Substrate for Supercapacitor Electrode

Abstract

A layer of MnO 2 was loaded between the SnO 2 /Ti substrate and the layer of PANI via a potentiodynamic electrodeposition. Electrochemical tests such as cyclic voltammetry and galvanostatic charge/discharge were applied to investigate the performance of the electrodes. The morphologies of the electrodes were also observed to identify the effect of the MnO 2 layer. The specific capacitance of PANI with MnO 2 reached to 601.48 F g -1 at a current density of 0.1 mA cm -2 , which is 1.69 times as that of PANI electrodes without MnO 2 layer. This gratifying result may due to the synergistic effect between MnO 2 layer and PANI.