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High electrochemical performance of Co3O4-PVDF-NMP-based supercapacitor electrode

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Abstract

The harvesting of renewable energy storage has prompted extensive study on the energy storage devices, chiefly batteries and supercapacitors. Electrodes made up of nano-architecture arrays are promising candidate to strengthen the electrochemical performance of the energy storage devices. In this work, nano-sized Co3O4 materials have been prepared by facile coprecipitate technique. The materials were characterized by XRD, FTIR, SEM, EDAX, HR-TEM and XPS. The TEM studies confirmed the existence of nano-rods of length ranges from 50 to 160 nm. The electrochemical studies were carried out using three-electrode system. The Co3O4 electrode material exhibited prominent specific capacitance of 373.84 F g−1 at the current density of 1.5 A g−1 with superior cyclic stability of 92% after 1000 cycles. The Co3O4 nanorods are attributed to high surface to volume ratio which results in more provisions for active sites and in turn enhance the redox reactions. Also the EIS studies reveal the diffusive charge transfer mechanism that enhances the accumulation of charges. The results imply that Co3O4 nanoparticles would be a promising material for electrodes in supercapacitors.

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Data availability

The data that support the findings of this study are available from the corresponding author, Dr. R. Mariappan, upon reasonable request.

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Funding

The author acknowledge the Directorate of Technical Education, Government of Tamilnadu and University Grants Commission, UGC—Q4SERO, Hyderabad (India), for financial support under the project (No. MRP-4892/14 (SERO/UGC)) and Adhiyamaan College of Engineering, Hosur, for providing the research facility to carry out the research work.

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  1. Department of Physics, Government College of Engineering, Dharmapuri, Tamil Nadu, 636704, India

    A. Karthikeyan

  2. Department of Physics, Adhiyamaan College of Engineering (Autonomous), Hosur, Krishnagiri, Tamil Nadu, 635109, India

    A. Karthikeyan, R. Mariappan & E. Krishnamoorthy

  3. Department of Physics, Government College of Engineering, Bargur, Krishnagiri, Tamil Nadu, 635104, India

    R. Bakkiyaraj

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AK: contributed to methodology, formal analysis, resources, and funding acquisition. RM: contributed to conceptualization, methodology, investigation, data curation, and writing—review & editing. RB and EK contributed to conceptualization, methodology, writing—review & editing, supervision, validation, and project administration.

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Karthikeyan, A., Mariappan, R., Bakkiyaraj, R. et al. High electrochemical performance of Co3O4-PVDF-NMP-based supercapacitor electrode. J Mater Sci: Mater Electron 34, 728 (2023). https://doi.org/10.1007/s10854-023-10147-w

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