利用小角中子散射研究完全混溶的聚合物混合电解质

IF 5.1 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2024-11-13 DOI:10.1021/acs.macromol.4c01714

Jaeyong Lee, Emily E. Abdo, Cody Pratt, Yong Hyun Kwon, Jaeeon Lim, Vivaan Patel, Lilin He, Nitash P. Balsara

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引用次数: 0

摘要

我们研究了由聚（环氧乙烷）（PEO）、聚（丙二酸戊酯）（PPM）和双（三氟甲烷磺酰）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通过有效的 Flory-Huggins 相互作用参数 χeff 进行量化。共混电解质呈现单相，在所有盐浓度下，χeff 均为负值。值得注意的是，添加盐通常会导致聚合物共混物中的大相分离。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Completely Miscible Polymer Blend Electrolyte Studied by Small-Angle Neutron Scattering

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Completely Miscible Polymer Blend Electrolyte Studied by Small-Angle Neutron Scattering

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.

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.