A series of zwitterionic (ZI) copolymers, including both binary, fully-ZI and ternary, partially-ZI copolymer variations, have been successfully employed as scaffolds to support mechanically robust ionic liquid-based gel (ionogel) electrolytes containing sodium bis(trifluoromethylsulfonyl)imide salt. All of the synthesized ionogels, which were optically transparent and freestanding without any covalent cross-links, contained 15 mol % copolymer and displayed room-temperature ionic conductivities above 1 mS cm^–1 while also exhibiting high compressive elastic modulus values (0.7–11 MPa). The activation energy of ionic conductivity of an ionogel with a fully-ZI copolymer scaffold (18 kJ mol^–1) was found to be noticeably lower than that of the ionic liquid electrolyte solution itself (23 kJ mol^–1), highlighting the positive role that ZI moieties may play in aiding ion transport. NMR chemical shift analysis revealed favorable interactions between sodium cations and both types of ZI motifs employed here (sulfobetaine and phosphorylcholine). In addition, the sodium-ion transference number value of a ternary copolymer-supported ionogel electrolyte was determined to be larger compared to that of the ionic liquid solution (0.19 vs 0.10, respectively).

中文翻译：

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两性离子共聚物支持的离子凝胶电解质，具有钠盐/离子液体溶液

一系列两性离子（ZI）共聚物（包括二元，全ZI和三元，部分ZI共聚物的变化形式）已成功用作支架，以支持含有双（三氟甲基磺酰基）钠的机械坚固的离子液体基凝胶（ionogel）电解质酰亚胺盐。所有合成的离子凝胶都是光学透明的且独立的，没有任何共价交联键，包含15 mol％的共聚物，并且室温离子电导率高于1 mS cm ^–1，同时还具有较高的压缩弹性模量值（0.7-11 MPa） ）。完全ZI共聚物支架的离子凝胶的离子电导率活化能（18 kJ mol ^–1）明显低于离子液体电解质溶液本身（23 kJ mol ^–1），这突出表明ZI部分可能在协助离子迁移中发挥积极作用。NMR化学位移分析显示，钠阳离子与此处使用的两种ZI基序（磺基甜菜碱和磷酸胆碱）之间都具有良好的相互作用。另外，与离子液体溶液相比，三元共聚物负载的离子凝胶电解质的钠离子转移数值被确定为更大（分别为0.19对0.10）。