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Bioengineered Ag/NiO nanocomposites as advanced battery-supercapacitor electrodes for highly efficient symmetric hybrid devices

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Abstract

In the present work, Ag/NiO nanocomposite was synthesized through the sol–gel process using Withania somnifera leaf extract (WSLE). UV–Vis absorption from ~ 250 to 500 nm confirms the formation of Ag/NiO nanocomposite. Spherical morphology was examined by scanning electron microscopy, and its elemental compositions were identified by energy dispersive absorption spectroscopy. The composite nature of Ag/NiO was confirmed through powder X-ray diffraction analysis. Density profiles of mid-bond electrons and bond length were also analysed with the help of Rietveld refinement method. Fourier transform infrared spectroscopy addressed the alkaloids as the main responsible biocompounds in the leaf extract of WSLE. The good thermal stability and superparamagnetic properties of the sample have been studied by TGA/DTA and VSM analysis. The supercapacitor Ag/NiO electrode reveals the specified capacitance of 262 F/g at a scan rate of 5 mV/s, and about 90.34% of retention was maintained after 5000 cycles. The battery-supercapacitor capacitive contribution of the electrode was estimated through the Transatti method. Battery type dominance kinetics on/from the surface of Ag/NiO electrode was analysed. Furthermore, admirable electrochemical properties of Ag/NiO have been observed in the symmetric hybrid device with a maximum energy density of 26 Wh/Kg and power density of 1580 W/Kg, demonstrating that bioengineered Ag/NiO electrodes are suitable for electrochemical energy storage applications. Intermolecular interactions are confirmed by the formation of critical points of electron density (3, -1) of the obtained complex.

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Acknowledgements

The authors (KC and KG) are thanks to Kalasalingam Academy of Research Education, Krishnankoil, Tamil Nadu, India, for providing the necessary research facilities.

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  1. Karuppiah Chinnaiah and Karthik Kannan are equally contributed authors.

Authors and Affiliations

  1. Department of Physics, School of Advanced Sciences, International Research Centre, Kalasalingam Academy of Research and Education, Krishnankoil, Virudhunagar, 626 126, Tamil Nadu, India

    Karuppiah Chinnaiah & Krishnamoorthy Gurushankar

  2. Institute of Agriculture Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, 602 105, Tamil Nadu, India

    Karthik Kannan

  3. Laboratory of Computational Modelling Drugs, Higher Medical and Biological School, South Ural State University, Chelyabinsk, 454 080, Russia

    Nadezhda Palko, Maria Grishina & Krishnamoorthy Gurushankar

  4. Department of Physics, Annamalai University, Annamalai Nagar, Chidambaram, 608 002, Tamil Nadu, India

    L. Guganathan

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KC: methodology, formal analysis, visualization, writing—original draft preparation. KK: conceptualization, methodology, supervision, reviewing and editing. NP: methodology, formal analysis, visualization and theoretical validation. MG: formal analysis, theoretical validation, and supervision. LG: formal analysis and visualization. KG: conceptualization; methodology; supervision; writing, original draft; reviewing and editing.

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Chinnaiah, K., Kannan, K., Palko, N. et al. Bioengineered Ag/NiO nanocomposites as advanced battery-supercapacitor electrodes for highly efficient symmetric hybrid devices. Ionics 30, 1691–1707 (2024). https://doi.org/10.1007/s11581-023-05361-9

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