We studied blend electrolytes comprising poly(ethylene oxide) (PEO), poly(pentyl malonate) (PPM), and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). Ion transport in the blend electrolytes resembles transport in PEO/LiTFSI and PPM/LiTFSI systems. The thermodynamic properties of the PEO/PPM/LiTFSI blend electrolytes were studied by small-angle neutron scattering (SANS). The effect of added salt on polymer blend thermodynamics is quantified by an effective Flory–Huggins interaction parameter, χ_eff. The blend electrolytes exhibit one-phase, and χ_eff is negative at all salt concentrations. This is noteworthy because the addition of salt generally leads to macrophase-separation in polymer blends.

中文翻译：

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通过小角中子散射研究的完全混溶聚合物共混电解质


我们研究了由聚环氧乙烷 （PEO） 、聚戊基丙二酸酯 （PPM） 和双（三氟甲磺酰基）酰亚胺锂 （LiTFSI） 组成的混合电解质。混合电解质中的离子传输类似于 PEO/LiTFSI 和 PPM/LiTFSI 系统中的传输。通过小角中子散射 （SANS） 研究了 PEO/PPM/LiTFSI 混合电解质的热力学性质。添加盐对聚合物共混热力学的影响由有效的 Flory-Huggins 相互作用参数 χ_eff 量化。混合电解质呈单相状态，χ_eff 在所有盐浓度下均为负值。这一点值得注意，因为添加盐通常会导致聚合物共混物中的宏观相分离。