Role of polyvinyl alcohol in the conductivity behaviour of polyethylene glycol-based composite gel electrolytes |
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Authors: | S K Patel R B Patel A Awadhia N Chand S L Agrawal |
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Institution: | (1) Solid State Ionics Laboratory, Department of Physics, A.P.S. University, Rewa, 486 003, India;(2) Regional Research Laboratory, Hoshangabad Road, Bhopal, 462 026, India |
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Abstract: | An attempt has been made in the present work to combine gel and composite polymer electrolyte routes together to form a composite
polymeric gel electrolyte that is expected to possess high ionic conductivity with good mechanical integrity. Polyethylene
glycol (PEG) based composite gel electrolytes using polyvinyl alcohol (PVA) as guest polymer have been synthesized with 1
molar solution of ammonium thiocyanate (NH4SCN) in dimethyl sulphoxide (DMSO) and electrically characterized. The ionic conductivity measurements indicate that PEG:PVA:NH4SCN-based composite gel electrolytes are superior (σ
max = 5.7 × 10−2 S cm−1) to pristine electrolytes (PEG:NH4SCN system) and conductivity variation with filler concentration remains within an order of magnitude. The observed conductivity
maxima have been correlated to PEG:PVA:NH4SCN-and PVA:NH4SCN-type complexes. Temperature dependence of conductivity profiles exhibits Arrhenius behaviour in low temperature regime
followed by VTF character at higher temperature.
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Keywords: | Polymer blend gels polymer-based composite conducting polymers |
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