Polyaniline/TiO2 nanocomposite for high performance supercapacitor

Abstract

A binary polyaniline/TiO₂ and varied weight ratio TiO₂/PANI nanocomposite was successfully fabricated as an electrode for energy storage application. The TiO₂ nanoparticles were synthesized via manual irradiation system with wavelength 256 nm and power 125 W. Polyaniline/TiO₂ was then prepared by in situ polymerizing TiO₂ onto aniline monomer. Polyaniline nanofibers are loaded with TiO₂ to product core-shell system. The polyaniline/TiO₂ nanocomposite were characterized using XRD, XPS, TEM, TGA, CP and LCR measurements. The structure properties were examined by XRD and XPS, which confirmed preparing polyaniline/TiO₂ binary nanocomposite. The thermal stability was investigated using TGA and obtained high stability of polyaniline/TiO₂ compared with polyaniline, while the electrochemical properties were examined by LCR measurements. The LCR measurements were appeared dielectric constant and dielectric loss for incorporating TiO₂ through PANI. Varied weights ratio TiO₂ was worked in increasing the stored energy ability of polyaniline. Notably, the electrochemical investigate results appear that the PANI/TiO₂ has a high specific capacitance (250 F/g) compared with pure PANI (200 F/g).

KEY WORDS: Supercapacitor, UV irradiation, XPS, LCR, nanofibers

Bull. Chem. Soc. Ethiop. 2024, 38(4), 1177-1188.                                                 

DOI: https://dx.doi.org/10.4314/bcse.v38i4.28