Gel electrolyte system based on polyvinyl chloride with addition of LiClO/sub 4//propylene carbonate: structure, morphology, thermal and conductivity properties

• Published in: IEEE transactions on dielectrics and electrical insulation Vol. 9; no. 4; pp. 551 - 554
• Main Authors: Shilov, V.V., Gomza, Yu.P., Klepko, V.V., Slisenko, V.I., Vasil'kevich, A.A., Shembel, E.M., Burmistr, M.V., Pissis, P.
• Format: Journal Article
• Language: English
• Published: IEEE 01-08-2002
• Subjects: Atomic measurements; Batteries; Glass; Morphology; Neutron spin echo; Polymer gels; Solvents; Temperature; Thermal conductivity; X-ray scattering
• DOI: 10.1109/TDEI.2002.1024432
• EISSN: 1558-4135
• ISSN: 1070-9878

X-ray scattering, calorimetric, and quasi-elastic neutron scattering (QENS) investigations of the polymer gel electrolytes based on 20% PVC, containing 80% of propylene carbonate (PC)-LiClO/sub 4/ solution as a liquid phase were made. It was established that after incorporating PC into the micropores of PVC gels the glass transition of PC increased by 3 K. This is, evidently, a reflection of an effect of confining liquid PC in the pores of PVC microphase-separated morphology. Addition of salt to the PVC-PC system results in raising T/sub g/ of both the pure PC and PVC-PC gel by 10 K. The SAXS data of pure PVC and PVC-PC and PVC-PC-LiClO/sub 4/ indicate that the gels based on PVC consist of microdomains of a different composition. Single-particle and collective dynamics of solvent molecules in free state and in the pores of polymer gels based on PVC were studied by quasi-elastic neutron scattering technique.