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Impedance and dielectric studies of nanocomposite polymer electrolyte systems using MMT and ferroelectric fillers

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Abstract

Impedance and dielectric properties of nanocomposite polymer electrolyte systems modified with nano size MMT and ferroelectric fillers have been investigated for varying lithium to oxygen ratios. The changes in the structural properties of the electrolyte samples were characterized by X-ray diffraction (XRD) and differential scanning calorimetric (DSC) technique. The ion transport number estimated by DC polarization technique is found to be between 0.86 and 0.95. The bulk conductivities of nanocomposite polymer electrolyte films were studied using impedance spectroscopic technique. The impedance plot shows high frequency semicircle, due to the bulk effect of sample and maximum ionic conductivity of 2.15 × 10−4 Scm−1 was observed for (PEO)4LiCBSM at 323 K with lithium to oxygen ratio 1: 4. The complex impedance data was used to evaluate ionic conductivity and dielectric relaxation process, to understand the ion transport mechanism in these systems.

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Acknowledgments

This work was carried out under the Naval Research Board-DRDO (Government of India) project grant (project no: DNRD/05/4003/NRB/187).

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Authors and Affiliations

  1. Physics R&D centre, PES Institute of Technology, Bangalore, 560085, India

    V. R. Sunitha & S. Radhakrishnan

  2. Department of physics, PES University, Bangalore, 560085, India

    V. R. Sunitha

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  1. V. R. Sunitha
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  2. S. Radhakrishnan
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Correspondence to V. R. Sunitha.

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Sunitha, V.R., Radhakrishnan, S. Impedance and dielectric studies of nanocomposite polymer electrolyte systems using MMT and ferroelectric fillers. Ionics 22, 2437–2446 (2016). https://doi.org/10.1007/s11581-016-1784-0

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  • DOI: https://doi.org/10.1007/s11581-016-1784-0

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