• Preparation and characterization of PAN–KI complexed gel polymer electrolytes for solid-state battery applications

• Fulltext

https://www.ias.ac.in/article/fulltext/boms/039/04/1047-1055

• Keywords

Polyacrylonitrile; solution casting technique; differential scanning calorimetry; X-ray diffraction; electrical properties.

• Abstract

The free standing and dimensionally stable gel polymer electrolyte films of polyacrylonitrile (PAN): potassium iodide (KI) of different compositions, using ethylene carbonate as a plasticizer and dimethyl formamide as solvent, are prepared by adopting ‘solution casting technique’ and these films are examined for their conductivities. The structural, miscibility and the chemical rapport between PAN and KI are investigated using X-ray diffraction, Fourier transform infrared spectroscopy and differential scanning calorimetry methods. The conductivity is enhanced with the increase in KI concentration and temperature. The maximum conductivity at 30$^{\circ}$C is found to be $2.089 \times 10^{−5}$ S cm$^{−1}$ for PAN:KI (70:30) wt%, which is nine orders greater than that of pure PAN (${\lt}10^{−14}$ S cm$^{−1}$). The conductivity-temperature dependence of these polymer electrolyte films obeys Arrhenius behaviour with activation energy ranging from 0.358 to 0.478 eV. The conducting carriers of charge transport in these polymer electrolyte films are identified by Wagner’s polarization technique and it is found that the charge transport is predominantlydue to ions. The better conducting sample is used to fabricate the battery with configuration K/PAN $+$ KI/I$_2$ $+$ C $+$ electrolyte and good discharge characteristics of battery are observed.

• Author Affiliations

1. Solid State Ionics Research Laboratory, Department of Physics, K L University, Vaddeswaram 522502, India
2. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar 522510, India
3. Department of Physics, Malaviya National Institute of Technology Jaipur, Jaipur 302017, India

• Bulletin of Materials Science

Volume 43, 2020
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• Editorial Note on Continuous Article Publication

Posted on July 25, 2019