An attempt to obtain solid-state polymer electrolytes based on cellulose nanofibers (CNF) swollen with a protic ionic liquid (PIL) was successful. We extended previous studies of nanocomposites based on proton-conducting cellulose, and instead of imidazole (Im), we used 1-methylimidazolium bis(trifluoromethylsulfonyl)imide as a conductive filler. We present two manufactured composites with different PIL contents, of which we used the CNF-Im nanocomposite as the base material. The obtained cellulose/PIL composites have demonstrated the highest thermal stability thus far, reaching up to 250 °C. At 220 °C, one of the CNF-Im/PIL composites has a maximum conductivity of 1.3 × 10^–1 S/m. That means it is the first cellulose-based composite that exhibits such high ionic conductivity over a high-temperature range under anhydrous conditions.

中文翻译：

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质子离子液体溶胀的高温质子传导纤维素纳米纤维的热电性能


尝试获得基于用质子离子液体（PIL）溶胀的纤维素纳米纤维（CNF）的固态聚合物电解质是成功的。我们扩展了之前基于质子传导纤维素的纳米复合材料的研究，并使用 1-甲基咪唑鎓双（三氟甲基磺酰基）亚胺代替咪唑（Im）作为导电填料。我们展示了两种具有不同 PIL 含量的复合材料，其中我们使用 CNF-Im 纳米复合材料作为基础材料。所获得的纤维素/PIL复合材料表现出迄今为止最高的热稳定性，高达250°C。在 220 °C 时，其中一种 CNF-Im/PIL 复合材料的最大电导率为 1.3 × 10 ^–1 S/m。这意味着它是第一种在无水条件下在高温范围内表现出如此高离子电导率的纤维素基复合材料。