Poly(ethylene oxide): Succinonitrile-a polymeric matrix for fast-ion conducting redox-couple solid electrolytes

摘要

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.