Thermally stable, flexible polymer gel electrolytes with high ionic conductivity are prepared by mixing the ionic liquid 1‐butyl‐1‐methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (C₄mpyrTFSI), LiTFSI and poly(vinylidene difluoride‐co‐hexafluoropropylene (PVDF‐HFP). FT‐IR and Raman spectroscopy show that an amorphous film is obtained for high (60 %) C₄mpyrTFSI contents. Thermogravimetric analysis (TGA) confirms that the polymer gels are stable below ∼300 °C in both nitrogen and air environments. Ionic conductivity of 1.9×10⁻³ S cm⁻² at room temperature is achieved for the 60 % ionic liquid loaded gel. Germanium (Ge) anodes maintain a coulombic efficiency above 95 % after 90 cycles in potential cycling tests with the 60 % C₄mpyrTFSI polymer gel.

中文翻译：

---

用于锂离子电池中锗薄膜阳极的离子液体基聚合物凝胶电解质。

通过将离子液体1-丁基-1-甲基吡咯烷鎓双（三氟甲基磺酰基）酰亚胺（C ₄ mpyrTFSI），LiTFSI和聚（偏二氟乙烯-共六氟丙烯（PVDF-HFP） ）.FT -IR和拉曼光谱表明，高含量（60％）的C ₄ mpyrTFSI含量可得到非晶膜。热重分析（TGA）证实聚合物凝胶在约300°C的氮气和空气环境下均稳定。负载60％离子液体的凝胶在室温下的离子电导率达到1.9×10 ^-3  S cm ^-2，锗（Ge）阳极在60％C的潜在循环测试中经过90个循环后，库仑效率保持在95％以上₄ mpyrTFSI聚合物凝胶。