A novel ternary polymer composite comprising prussian blue (PB) based polypyrrole (PPy) incorporated with TiO2, PPy–PB/TiO2 is synthesized via chemical oxidative polymerization and is fabricated as an active electrode material for supercapacitor applications. Physico-chemical characterization of the as-prepared ternary composite was carried out using XRD, Raman spectroscopy, XPS, FESEM, HRTEM, EDAX and TGA techniques. The electrochemical properties of PPy–PB/TiO2 are investigated using cyclic voltammetry, impedance spectroscopy, and charge/discharge measurements in a three-electrode configuration, employing different aqueous electrolytes namely acidic (1 M H2SO4), alkaline (1 M KOH), and neutral (1 M KCl). The highest specific capacitance of 429 F g−1 has been obtained in an acidic electrolyte (H2SO4) which is superior to alkaline and neutral electrolyte with capacitance retention of 98.87% of their initial capacitance after 2500 charge/discharge cycles, which indicates the good electrochemical stability of the polymer composite. The present work demonstrates PPy–PB/TiO2 nanocomposite as an excellent candidate for supercapacitor electrode material.
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The authors (Suganthi Muthusamy and Julie Charles) are thankful to the management of S.S.N. College of Engineering, Kalavakkam, for providing the necessary infrastructural facility and financial support for the current research work.
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Muthusamy, S., Charles, J. Metal–organic framework of nanostructured polypyrrole incorporated with TiO2 nanoparticles for supercapacitor electrode. J Mater Sci: Mater Electron (2021). https://doi.org/10.1007/s10854-021-05445-0