Supercapacitor Performance of in Situ Polymerization for PANI/MnO2-TiO2

Abstract

Manganese-titanium oxide particles coated with polyaniline (PANI) have been suggested as a highly favorable electrode material for supercapacitors. The synthesis of MnO2-TiO2 particles was achieved using the sol-gel technique, followed by calcination. The MnO2-TiO2 was mixed with pre-synthesized PANI to create a composite material called PANI/ MnO2-TiO2. The structural composition and purity of the produced materials were verified using X-ray diffraction (XRD). The morphological analysis conducted using field emission scanning electron microscopy (FESEM) revealed that particles are securely attached to the branched-structured PANI, facilitating rapid charge transfer. The electrochemical properties of MnO2-TiO2 and PANI/MnO2-TiO2 were analyzed using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), 1 M H2SO4 electrolyte. PANI/MnO2-TiO2 demonstrated a substantial increase in specific capacity (1500 C/g) compared to PANI (450 C/g) at 1 A/g. This improvement can be attributed to the enhancement of redox-active sites and the synergistic interaction of the conductive PANI and MnO2-TiO2.