Abstract
The paper reports preparation and characterization of a proton conducting polymer electrolyte system comprising a blend of poly(vinylalcohol) (PVA) and poly(vinylpyrrolidone) (PVP) and liquid electrolyte of ammonium thiocyanate (NH4SCN) in the ionic liquid 1-Ethyl-3-methylimidazolium thiocyanate [C2C1Im][SCN]. The well-known solution cast technique has been used to prepare films of the blend polymer electrolyte. The films have been characterized using FTIR and Raman spectroscopy, X-ray diffraction, DSC/TGA, complex impedance spectroscopy and cyclic voltammetry. The liquid electrolyte has been found to form complex with the polymer blend system. The electrolyte system has been observed to possess very small crystallinity. The melting point of the electrolyte has been found to be 121 °C for the highest conducting composition. The ionic conductivity of the films has been observed to be ~ 10–2 S cm−1 at room temperature. The temperature dependence of ionic conductivity of the blend electrolyte shows VTF behavior. The ion conduction has been investigated with the help of dielectric behavior of the electrolyte membrane. The paper also reports confirmation of protonic conduction in the electrolyte using complex impedance spectroscopy and cyclic voltammetry.
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The authors are thankful to JIIT, Noida for providing the financial support and extending experimental facilities for the work. One of the authors (SSP) is thankful to JIIT Noida for providing fellowship.
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Pundir, S.S., Mishra, K. & Rai, D.K. Structural, thermal and electrochemical studies of PVA/PVP—NH4SCN—[C2C1Im][SCN] polymer electrolyte system. J Mater Sci: Mater Electron 32, 1476–1490 (2021). https://doi.org/10.1007/s10854-020-04918-y
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DOI: https://doi.org/10.1007/s10854-020-04918-y