SOLID-STATE POLYMERIC ELECTROLYTES BASED ON POLY(EPICHLOROHYDRIN)

Elastomers constituted of the homopolymer of epichlorohydrin, its copo lymer with ethylene oxide and its terpolymer with ethylene oxide and a llyl-glycidyl-ether were studied as polymeric electrolytes in polymer/ LiClO4 systems. The variation of the ionic conductivity with salt conc entration indicated that the copolymer and the terpolymer show the hig hest conductivities, ca. 10(-5) S cm(-1) at 30 degrees C. Also, the fi tting of the ionic conductivity versus inverse of temperature curves w ith the VTF equation indicated a conductivity mechanism similar to pol y(ethylene oxide) for the copolymer and the terpolymer. The potential stability window determined by cyclic voltammetry is 3.5 V and the pol ymers are stable to heating up to 250 degrees C. These results confirm the feasibility of using the copolymer and the terpolymer systems wit h LiClO4 as polymeric solid state electrolytes.