EFFECT OF MIXED ION DOPING, DOPING CONCENTRATION AND TEMPERATURE ON THE IONIC TRANSFERENCE NUMBER, MOBILITY AND CARRIER CONCENTRATION IN POLYMER ELECTROLYTES

The variation of number of charge carriers with temperature, dopant salt concentration and mixed anion dcping in polymer electrolytes has been studied in detail by direct measurement of sigma and mu. It is shown that: (a) At T-m, the number of charge carriers rapidly increases due to enhanced salt dissociation ass result of high dielectric constants at. T > T-m. (b) Crystallinity also plays a role in modifying mobile n(cation) or n(anion) in mixed anion system, which is proposed as an approach to modulate t(cation) (e) ion asssociation, redissociation and mnltiplet formation are responsible for the variation of sigma with dopant salt concentration.