Abstract
The effect of the dispersion of zinc oxide (ZnO) nanoparticles in the zinc ion conducting gel polymer electrolyte is studied. Changes in the morphology/structure of the gel polymer electrolyte with the introduction of ZnO particles are distinctly observed using X-ray diffraction and scanning electron microscopy. The nanocomposites offer ionic conductivity values of >10−3 S cm−1 with good thermal and electrochemical stabilities. The variation of ionic conductivity with temperature follows the Vogel–Tamman–Fulcher behavior. AC impedance spectroscopy, cyclic voltammetry, and transport number measurements have confirmed Zn2+ ion conduction in the gel nanocomposites. An electrochemical stability window from −2.25 to 2.25 V was obtained from voltammetric studies of nanocomposite films. The cationic (i.e., Zn2+ ion) transport number (t +) has been found to be significantly enhanced up to a maximum of 0.55 for the dispersion of 10 wt.% ZnO nanoparticles, indicating substantial enhancement in Zn2+ ion conductivity. The gel polymer electrolyte nanocomposite films with enhanced Zn2+ ion conductivity are useful as separators and electrolytes in Zn rechargeable batteries and other electrochemical applications.
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The authors acknowledge the financial support received from the Department of Science & Technology, New Delhi, and University of Delhi (under the Scheme to Strengthen R&D Doctoral Research Programme providing funds to University faculty, 11-17 Research Fund).
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Sellam, Hashmi, S.A. Enhanced zinc ion transport in gel polymer electrolyte: effect of nano-sized ZnO dispersion. J Solid State Electrochem 16, 3105–3114 (2012). https://doi.org/10.1007/s10008-012-1733-4
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DOI: https://doi.org/10.1007/s10008-012-1733-4