Study of the plasticizer effect on a (PEO+NaYF4) polymer electrolyte and its use in an electrochemical cell

Abstract Poly(ethylene oxide) (PEO)-based solid polymer electrolyte films with NaYF4 and NaYF4+plasticizer (dimethyl formamide) have been prepared by the solution-cast technique. Various experimental techniques have been used, such as electrical conductivity (composition dependence, temperature dependence in the temperature range 303–400 K) and transport number measurements, to characterise these polymer electrolyte films. The conductivity–temperature plots showed an increase in conductivity with increasing temperature. The increase in conductivity is about 10 times larger in the plasticizer-added (PEO+NaYF4) polymer electrolyte system compared with the pure (PEO+NaYF4) polymer electrolyte system. Electrochemical cells of configuration Na/(PEO+NaYF4+plasticizer)/(I2+C+electrolyte) have been fabricated. The discharge characteristics of the cells were studied for a constant load of 100 kΩ. The open circuit voltage (OCV), short circuit current (SCC), discharge time for the plateau region, etc., were evaluated and compared with data from our earlier reported (PEO+NaYF4) electrochemical cells.

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