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Study on ionic conductivity and dielectric properties of PEO-based solid nanocomposite polymer electrolytes

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Abstract

The ionic conductivity and dielectric properties of the solid nanocomposite polymer electrolytes formed by dispersing a low particle-sized TiO2 ceramic filler in a poly (ethylene oxide) (PEO)-AgNO3 matrix are presented and discussed. The solid nanocomposite polymer electrolytes are prepared by hot press method. The optimum conducting solid polymer electrolyte of polymer PEO and salt AgNO3 is used as host matrix and TiO2 as filler. From the filler concentration-dependent conductivity study, the maximum ionic conductivity at room temperature is obtained for 10 wt% of TiO2. The real part of impedance (Z′) and imaginary part of impedance (Z″) are analyzed using an LCR meter. The dielectric properties of the highest conducting solid polymer electrolyte are analyzed using dielectric permittivity (ε′), dielectric loss (ε″), loss tangent (tan δ), real part of the electric modulus (M′), and imaginary part of the electric modulus (M″). It is observed that the dielectric constant (ε′) increases sharply towards the lower frequencies due to the electrode polarization effect. The maxima of the loss tangent (tan δ) shift towards higher frequencies with increasing temperature. The peaks observed in the imaginary part of the electric modulus (M″) due to conductivity relaxation shows that the material is ionic conductor. The enhancement in ionic conductivity is observed when nanosized TiO2 is added into the solid polymer electrolyte.

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Acknowledgments

We gratefully acknowledge the kind support of the management of Shri Shankaracharya Technical Campus (SSTC). Helpful discussions with Prof. R C Agrawal (School of Studies in Physics Pt. RSU, Raipur, Chattishgarh, India) and Dr. Manickam Minakshi (School of Engineering and Information Technology, Murdoch University, Australia) is also gratefully acknowledged.

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  1. Computational Nanoionics Research Lab, Department of Applied Physics, FET, SSGI, Shri Shankaracharya Technical Campus, Junwani, Bhilai, Chhattisgarh, 490020, India

    Mohan L. Verma & Homendra D. Sahu

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  1. Mohan L. Verma
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Correspondence to Mohan L. Verma.

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Verma, M.L., Sahu, H.D. Study on ionic conductivity and dielectric properties of PEO-based solid nanocomposite polymer electrolytes. Ionics 23, 2339–2350 (2017). https://doi.org/10.1007/s11581-017-2063-4

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  • DOI: https://doi.org/10.1007/s11581-017-2063-4

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