基于皮罗利和伊米达的离子液体和电解质,具有灵活的橄乙烯阳离子
Mukhtiar Ahmed1, Andrei Filippov1, Patrik Johansson2
1Chemistry of Interfaces, Luleå University of Technology, SE-971 87, Luleå, Sweden.
概括
新的无离子液体 (ILs) 和电解质利用灵活的橄乙烯离子来实现低玻璃过渡温度. 基于的电解质在电化学应用中显示出有前途的特性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物化学 聚合物化学
背景情况:
- 离子液体 (ILs) 是在低温下变为液体的盐,在各种应用中具有独特的特性.
- 由于环境和成本原因,无的ILs是可取的.
- 开发具有定制性质的新型IL仍然是关键的研究领域.
研究的目的:
- 引入一类新的无离子液体和电解质.
- 为了研究亚利法性柔性橄乙烯离子对IL特性的影响.
- 为了评估这些IL和电解质用于Li+导电的性能.
主要方法:
- 离子液体与2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 甲酸乙酸 (MEA) 和2 - - - - - - - - - - - - - - - - - - - - 2 - - - - - - - - - - - 甲酸乙酸乙酸 (MEEA) 离子体的合成.
- 通过用LiMEEA对ILs进行兴奋,制备Li+导电解质.
- 使用热分析对玻璃过渡温度 (Tg) 的表征.
- 评估热和电化学稳定性.
- 对阴离子运输特性进行评估.
主要成果:
- 含有MEEA离子的离子液体和电解质由于离子灵活性而表现出低的玻璃过渡温度 (Tg),低至-60°C.
- 基于伊米达的IL显示出较好的热稳定性,但Tg较高,电化学稳定性较低,与类同类相比.
- 清洁ILs显示了可比的阴离子运输特性.
- 添加盐降低了运输特性,最显著的是基于pyrrolidinium的电解质.
结论:
- 灵活的基离子为低Tg,无离子液体和电解质提供了一条途径.
- 基于pyrrolidinium的电解质显示出Li+导电应用的潜力,尽管在使用兴奋剂时会减少一些运输属性.
- 选择的阴离子 (pyrrolidinium 和 imidazolium) 会影响热和电化学稳定性.
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