UV-CURABLE POLYMER ELECTROLYTE

UV-cured polymer electrolytes were prepared based on polyethylene glyc ol diacrylate (PEGDA). A series of PEGDA was complexed with lithium tr iflate salt and the effect of chain length of PEG on the ionic conduct ivity was studied at various salt concentration. The highest ionic con ductivity at room temperature was 1.7 X 10(-5) S/cm for 14 EGDA at the [EO]/[Li+] mole ratio of 8 which resulted from the balance between th e number of total charge carriers and hindered mobility of polymer cha in. Cyclic voltammogram for polypyrrole/PEGDA electrolyte/Li foil cell showed a pair of sharp redox peaks even at room temperature.