Poly(ethyleneoxide)/Poly(2-vinylpyridine)/Lithium Perchlorate Blends. NewMaterials for Solid Polymer Electrolytes

摘要

Poly(ethyleneoxide) (M.W. 600,000/poly(2-vinylpyridine) (M.W. 200.000/Lithiumperchlorate (PEO/P2VP/LiClO4) blends were prepared by solution blending. The LiClO4 acts as a compatibilizing agent. most likely, by the simultaneous interaction of the Li+ ion with the oxygens of the poly(ethyleneoxide) and a nitrogen of the poly (2-vinylpyridine). the ionic conductivity of these blends increases with increasing salt content, in contrast to that observed conductivity of poly(ethyleneoxide)/LiClO4 or the generally observed behavior of the polymer salt electrolytes. The observed conductivity behavior of our new blends is possibly because poly(2-vinylpyridine) effectively disperses the salt throughout the blends and impedes the aggregation in these blends than in the PEO/LiClO4 system. The Tg of the PEO/P2VP/LiClO4 blend, at the salt contents studied, is -35 deg C or lower. The blend with an ethyleneoxide/Li+ mole ratio of 2 displays a conductivity value of 6X1O-6S /cm at 30 deg C. Therefore, PEO/P2VP/LiClO4 blends can be taken as solid polymer electrolytes at room temperature.... Electroactive polymeric blends.