【摘要】 通过向丁二腈分子塑性晶体中加入固体碘盐和碘分子,制备了碘体系丁二腈基分子塑晶固态电解质。研究了不同阳离子的固体碘盐对丁二腈基固态电解质的相变、扩散系数以及离子电导率的影响。最终以碘化N-乙基吡啶作为固体碘盐与碘分子及丁二腈的摩尔比为2:1:100配制的固态电解质I-和I3-的扩散系数在室温达到1.83×10-6 cm2·s-1与1.22×10-6 cm2·s-1,固态电解质的离子电导率在30℃为1.7 m S·cm-1,制备的电池效率达1.57%。碘化N-乙基吡啶同时又是一种低成本和高成本效能的固体碘盐,更加具有商业应用价值。更多还原

【Abstract】 The succinonitrile, a molecular plastic crystal, was chosen as the solvent for solid state electrolyte due to its almost liquid like diffusion properties for I^-/I₃^-, which holds great potential to be used in photoelectron chemical cells. Solid state iodide salts with different cations were doped with iodine in the succinonitrile to further study how these cations in the iodide influence the electrolyte properties. The electrolyte by mixing 1-ethylpyridinium iodide（NEPI）, iodine and succinonitrile in a mole ratio 2:1:100 reaches a conductivity of 1.7 m S·cm^-1 at 30 ℃. The diffusion coefficients of iodide and triiodide in this solid electrolyte are determined to be 1.83×10^-6 cm²·s^-1 and 1.22×10^-6 cm²·s^-1 at room temperature, respectively. The solar cell with NEPI gets a power conversion efficiency of 1.57%. It is considered to be a promising candidate for solid state electrolyte with suitable melting point of 39.5 ℃, excellent electrochemical properties and facile fabrication process. Notably, solid state iodide NEPI also shows extremely high cost-effective with a low cost, which should be available for commercial applications.更多还原