Ionogels are an attractive class of materials for smart and flexible electronics and are prepared from the combination of a polymer and ionic liquid which is entrapped in this matrix. Ionogels provide a continuous conductive phase with high thermal, mechanical, and chemical stability. However, because of the higher percentage of ionic liquids it is difficult to obtain an ionogel with high ionic conductivity and mechanical stability, which are very important from an application point of view. In this work, ionogel films with high flexibility, excellent ionic conductivity, and exceptional stability were prepared using polyvinyl alcohol as the host polymer matrix and 1-ethyl-3-methylimidazolium hydrogen sulfate as the ionic liquid using water as the solvent for energy storage application. The prepared ionogel films exhibited good mechanical stability along with sustaining strain of more than 100% at room temperature and low temperature, the ability to withstand twisting up to 360° and different bending conditions, and excellent ionic conductivity of 5.12 × 10−3 S/cm. The supercapacitor cell fabricated using the optimized ionogel film showed a capacitance of 39.9 F/g with an energy and power densities of 5.5 W⋅h/kg and 0.3 kW/kg, respectively confirming the suitability of ionogels for supercapacitor application.

中文翻译：

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用于超级电容器应用的灵活、坚韧和高性能的 ionogel


Ionogels 是一类用于智能和柔性电子产品的有吸引力的材料，由聚合物和被困在该基质中的离子液体的组合制成。Ionogels 提供具有高热、机械和化学稳定性的连续导电相。然而，由于离子液体的百分比较高，很难获得具有高离子电导率和机械稳定性的离子凝胶，从应用的角度来看，这非常重要。在这项工作中，以聚乙烯醇为主体聚合物基质，以 1-乙基-3-甲基咪唑硫酸氢盐为离子液体，以水为溶剂，制备了具有高柔韧性、优异离子导电性和优异稳定性的离子凝胶薄膜，用于储能应用。制备的离子凝胶薄膜在室温和低温下表现出良好的机械稳定性以及超过 100% 的应变，能够承受高达 360° 的扭曲和不同的弯曲条件，以及 5.12 × 10-3 S/cm 的优异离子电导率。使用优化的离子凝胶薄膜制造的超级电容器电池的电容为 39.9 F/g，能量和功率密度分别为 5.5 W⋅h/kg 和 0.3 kW/kg，证实了离子凝胶适用于超级电容器应用。