Abstract
Polymeric solid electrolytes were prepared by dispersing homogeneously lithium perchlorate in a hydrogen-bonding type intermacromolecular complex of poly(methacrylic acid)-poly(ethylene oxide). They showed ionic conductivity of more than 10 -6 (S/cm) at room temperature. The conductivity depended on the molecular weight of the poly(ethylene oxide), the proportion of poly(ethylene oxide) and lithium perchlorate, and so on. Poly(ethylene oxide) with average molecular weights ranging from 400 to 2 × 10 4 were used to clarify the effect of chain length on the conductivity. The conductivity increased and the flexibility of the films improved with increasing the content of poly(ethylene oxide) with average molecular weight of 400. The maximum conductivity of 1.3 × 10 -5 (S/cm) at 60°C was obtained for the flexible film when the composition of poly(methacrylic acid)/poly(ethylene oxide)/lithium perchlorate was in the ratio of 17.0/ 68.0/15.0 in unit mol%.
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