Ionic liquid (IL)-based gel electrolytes (ionogels) show great potential as quasi-solid-state electrolytes (QSSEs) for lithium-ion batteries (LIBs). However, conventional ionogels face challenges involving complex gelation processes, high gelator content (usually greater than 20 wt %), lower conductivity than neat ILs, and low Li⁺ transference numbers. Here, we create novel lithium salt-containing supramolecular ionogels (SIGs) as efficient QSSEs for LIBs through a simple and environmentally friendly approach. By using a low-molecular-weight gelator, specifically 12-hydroxyoctadecanoic acid, lithium-containing IL electrolytes can be solidified at a gelator concentration of only 2 wt %. The resulting physical ionogels exhibit remarkable characteristics, including high ionic conductivity similar to neat ILs and improved electrochemical stability. In addition, these SIGs demonstrate a distinctive thermally reversible gel-to-sol transition, a quality not attainable in other QSSEs. This feature promotes better electrode/electrolyte contact, enabling excellent battery performance using LiFePO₄, LiNi_0.8Co_0.1Mn_0.1O₂, and LiCoO₂ cathodes, along with Li metal and Li₄Ti₅O₁₂ anodes.

基于离子液体（IL）的凝胶电解质（离子凝胶）作为锂离子电池（LIB）的准固态电解质（QSSE）显示出巨大的潜力。然而，传统的离子凝胶面临着复杂的凝胶化过程、高凝胶剂含量（通常大于 20 wt%）、比纯离子液体电导率低以及低 Li ⁺迁移数等挑战。在这里，我们通过简单且环保的方法创建了新型含锂盐超分子离子凝胶（SIG）作为 LIB 的高效 QSSE。通过使用低分子量胶凝剂，特别是12-羟基十八烷酸，含锂IL电解质可以在仅2wt%的胶凝剂浓度下固化。由此产生的物理离子凝胶表现出显着的特性，包括类似于纯离子液体的高离子电导率和改进的电化学稳定性。此外，这些 SIG 表现出独特的热可逆凝胶到溶胶转变，这是其他 QSSE 无法达到的质量。该特性促进了更好的电极/电解质接触，从而使用LiFePO ₄、LiNi _0.8 Co _0.1 Mn _0.1 O ₂和LiCoO ₂阴极以及Li金属和Li ₄ Ti ₅ O ₁₂阳极实现优异的电池性能。