Solid State Science and Technology, Vol. 17, No 1 (2009) 73-80

ISSN 0128-7389

 

CHARACTERIZATION OF PROTON CONDUCTING PVDF-HFP/PEMA BLEND BASED SOLID ELECTROLYTES

Siti Rudhziah and N. S. Mohamed

Center for Foundation Studies in Science,

University of Malaya, 50603 Kuala Lumpur.

 

ABSTRACT

Proton conducting poly(vinylidene fluoride-cohexafluoropropylene)/polyethyl methacrylate (PVDF-HFP/PEMA) blend based electrolytes with different compositions of NH4CF3SO3 salt have been prepared and characterized. XRD and SEM studies show that the addition of NH4CF3SO3 helps to generate more amorphous region in the semicystalline PVDF-HFP/PEMA system. The conductivity of the blend based electrolyte system increases with increasing content of NH4CF3SO3. The system containing 40 wt % of salt exhibits the highest room temperature conductivity of 6.90 × 10-4 S cm-1. The temperature dependence of ionic conductivity of the system follows an Arrhenius behavior. The frequency dependence of conductivity of the system obeys the universal power law, σ(ω) Aωn. The pre-exponent, n is found to decrease with increasing temperature suggesting that the Correlated Barrier Hopping model can be used to explain the conduction mechanism in the system.

 

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