SEM, XRD and electrical conductivity studies of PVDF-HFP-LiBF4 –EC plasticized gel polymer electrolyte

Micro porous gel type polymer electrolytes composed of 80 Wt% PVDF-HFP polymer - 20 Wt% LiBF4 salt in different concentrations of EC plasticizer (10Wt% - 70 Wt %) plasticizer have been synthesized by Solution cast technique. The effect of plasticizer in polymer-salt matrix, structural, morphological...

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Bibliographic Details
Main Authors: Sangeetha, M., Mallikarjun, A., Jaipal Reddy, M., Siva Kumar, J.
Format: Conference Proceeding
Language:English
Subjects:
Chemical synthesis
Conductivity
Current carriers
Electrical resistivity
Electrolytes
Ion currents
Ions
Morphology
Polymers
Recrystallization
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Summary:Micro porous gel type polymer electrolytes composed of 80 Wt% PVDF-HFP polymer - 20 Wt% LiBF4 salt in different concentrations of EC plasticizer (10Wt% - 70 Wt %) plasticizer have been synthesized by Solution cast technique. The effect of plasticizer in polymer-salt matrix, structural, morphological and ionic conductivity is studied. Structural and morphological studies showed increase in amorphous nature and recrystallization after a certain limit of EC plasticizer. The highest ionic conductivity of 1.510 × 10−3 Cm−1 is found for 40 Wt% of EC plasticizer at 303K. Addition of plasticizer increase free volume enables segmental motion of polymer and free mobility of ions. Also it provides more number of charge carriers in turn enhances the ionic conductivity up to certain limit of 40 Wt% of EC plasticizer. Further increase of plasticizer content creates ion-pair aggregation and recrystallization which reduces the ionic conductivity. The ionic conductivity obeys the VTF relationship for Gel type polymer electrolyte system.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4990217