IONIC-CONDUCTIVITY STUDIES OF POLYMER ELECTROLYTES CONTAINING ORGANOSULFUR SPECIES

The electrolyte composed of a PEO-based polymer complexed with an alkali metal thio/disulfide redox couple is used in an all solid-state electrochemical photovoltaic cell. Total ionic conductivity studies of the electrolytes modified PEO-MT/T2 (M = Li, Na, K), where T- stands for 5-mercapto-1-methyltetrazole ion and T2 for its dimere, are reported. As expected, the results show that the conductivity values measured at the same temperature increase with the atomic weight of the alkali cation. A maximum in conductivity is found with the system modified PEO-KT/T2 prepared at a O/K molar ratio of 8/1.