Unrevealing the capacitive performance of electrochemically engineered anatase-polypyrrole/ITO films: Electrochemical, microscopic and spectroscopic inspections | ||||
| International Journal of Materials Technology and Innovation | ||||
| Article 4, Volume 5, Issue 1, June 2025, Page 31-40 PDF (1.32 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ijmti.2025.379658.1122 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Fahim HAMIDOUCHE1; Kaouthar BOUGUERRA2; Zohra GHEBACHE3; Moustafa Sanad  4; Aldjia AITOUAKLI5; Zineb MEGUELLATI6
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| 1Laboratory of Applied Chemistry and Materials (LabCAM), University of M’hamed Bougara of Boumerdes, Avenue de l'Indépendance, Boumerdes, 35000, Algeria 2 Fibrous Polymer Processing and Shaping Laboratory, M’Hamed Bougara University of Boumerdes, Avenue de l'Indépendance, Boumerdes, 35000, Algeria | ||||
| 2Laboratory of Applied Chemistry and Materials (LabCAM), University of M’hamed Bougara of Boumerdes, Avenue de l'Indépendance, Boumerdes, 35000, Algeria | ||||
| 3Macromolecular Synthesis and Thio-Organic Macromolecular Synthesis Laboratory, USTHB, Algeria | ||||
| 4Central Metallurgical Research & Development Institute, P.O. Box: 87 Helwan,11421, Cairo, Egypt | ||||
| 5IAP / Algerian Petroleum Institute, Avenue du 1er Novembre 1954, Boumerdes, Algeria. | ||||
| 6Fibrous Polymer Processing and Shaping Laboratory, M’Hamed Bougara University of Boumerdes, Avenue de l'Indépendance, Boumerdes, 35000, Algeria | ||||
| Abstract | ||||
| The increasing demand for sustainable energy is one of the most important challenges facing the industrial sector in recent times, so we are always in constant need to search for new, simple, inexpensive and effective materials. In this prospective, homogeneous and stable electrode materials based on PPy/TiO2 on ITO glass substrate were electrochemically synthesized in aqueous medium. The electrochemically engineered films are structurally characterized and morphologically scanned using different spectroscopic and microspectroscopic techniques including X-ray diffraction (XRD), Fourier Transform Infra-Red (FTIR), and Field Emission Scanning Electron Microscope (FESEM), respectively. The light absorbance and photocurrent-potential measurements confirmed the improvement in the electronic conduction of TiO2/PPy-based deposited films. The best specific capacitance values of PPy films were achieved after 50 cycles of voltammetric deposition at 50 mV.s-1 with an oxidation current response of 4.75 mA and specific capacitance ~ 180 F.g-1. A remarkable increase in specific capacity was obtained as a result of incorporation of 10% anatase nanoparticles into the PPy matrix up to 250 F.g-1. Faster charge-discharge rates lead to the reduction of adsorbed ions on the electrode surface causing lower specific capacitance. Asymmetric supercapacitive cells of PPy@ITO and TiO2/PPy@ITO demonstrated excellent stability and capacity retention reaching up to 85% and 97.1%, respectively after 1000 multiple cycles. The impedance measurements carried out in the domain of 10 kHz to 10 mHz indicated that TiO2/PPy@ITO composite (~ ratio 0.1) has the lowest electrochemical resistance values for the electrolyte, charge transfer and ions diffusion from the electrolyte into the electrode surface. | ||||
| Keywords | ||||
| Polypyrrole/TiO2; Electropolymerization; Characterization; Galvanostatic Cycling; Specific capacitance | ||||
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