Abstract
A blend of poly(ethylene oxide), PEO, and succinonitrile, SN, was investigated for the first time for applying it as a polymeric matrix of low-cost and thermally stable fast-ion conducting redox-couple solid polymer electrolytes. The PEO–SN blend in equal weight fraction showed room temperature ionic conductivity of 1 × 10−8 S cm−1 with nearly two orders of magnitude higher than that of PEO due to reduced crystallinity. The blend resulted in a solid electrolyte with improved ionic conductivity of ∼7 × 10−4 S cm−1 at 25 °C. The blend and its electrolyte showed thermal stability up to 100 °C, which is essential for outdoor application of dye-sensitized solar cells.
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