Abstract
This paper explores the in-situ oxidative polymerization, polypyrrole/zinc oxide (PPy/ZnO) nanocomposites with less than 10% ZnO nanoparticles and their feasibility studies for supercapacitor electrodes. Structural analysis via XRD revealed improved crystallinity and confirmed ZnO nanoparticle incorporation, with a particle size less than 20 nm. TEM images confirmed hexagonal nanoparticle morphology. Raman spectroscopy indicated shifts in characteristic peaks, suggesting nanoparticle incorporation and potential ring deformation. Thermogravimetric studies showed increased degradation temperature with ZnO addition, implying enhanced stability. Electrochemical studies demonstrated specific capacitance peaking around 100, with enhanced performance attributed to increased nanoparticle content. The energy and power densities PPy/ZnO increased with higher weight percent of ZnO. Dielectric analysis revealed fluctuating values of dielectric constant with frequency, increasing up to a threshold ZnO concentration before decreasing. AC conductivity studies further supported enhanced electrode properties with increased filler concentration.
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Acknowledgements
One of the authors acknowledges Council of Scientific and Industrial Research (CSIR), Govt. of India (Order No. 03 (1363)/16/ EMR-II dated 11.05.2016) for funding this research project. One of the authors also thankful for the support of Science Engineering Research Board (SERB), New Delhi, Govt. of India (YSS / 2014 / 000649 dated 20 November 2015), for funding the project. We gratefully acknowledge Prof.(Dr).Nandakumar Kalarikkal (Director in Charge, School of Nanoscience and Nanotechnology,Mahatma Gandhi University,Kottayam) for helping us the dielectric and AC conductivity measurements. We also acknowledge SAIF,Mahatma Gandhi University, Kottayam, for providing the WITec ALPHA 300RA Germany equipment for Raman spectroscopy. All authors certify that they have no links with or involvement in any organisation or entity that has a financial or non-financial interest in the subject matter or materials covered in this manuscript.
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GA: methodology, investigation, data analysis, writing—original draft. GJ: investigation, data curation. VRM: methodology, validation. GGN: formal analysis. PCT: conceptualization, review. AJ: validation, data curation. GPJ: supervision,writing—review and editing. The final version of the manuscript has been approved by all authors.
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Aryadevi, G., Joseph, G., Mathew, V.R. et al. Optimizing the electrochemical properties of PPy/ZnO nanocomposites for supercapacitor electrode. J Mater Sci: Mater Electron 35, 1490 (2024). https://doi.org/10.1007/s10854-024-13225-9
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DOI: https://doi.org/10.1007/s10854-024-13225-9