结构灵活的基于和的离子液体电解质
Sourav Bhowmick1, Gaurav Tatrari1, Andrei Filippov1
1Chemistry of Interfaces, Lulea University of Technology, SE-971 87 Lulea, Sweden. faiz.ullah@ltu.se.
Physical chemistry chemical physics : PCCP
|July 14, 2023
概括
基于pyrrolidinium的离子液体由于它们的快速离子传输和良好的电化学特性,显示出作为高温超级电容电解质的前景,优于基于morpholinium的对应物.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
背景情况:
- 离子液体 (ILs) 是在环境温度下是液态的盐,为电化学应用提供独特的特性.
- 结构灵活的酸,如 (Pyrr) 和 (Morph) 可以影响IL的特性.
- 在IL电解质中的酸离子被探索其潜力.
研究的目的:
- 研究基于Pyrr和Morph的ILs的物理化学和电化学特性,其中含有酸阳离子.
- 评估这些ILs作为高温超级电容器中的电解质的性能.
主要方法:
- 基于Pyrr和Morph的离子液体的合成和表征.
- 测量离子传输特性,热稳定性,玻璃过渡温度和电化学稳定性窗口.
- 在高温下对称石墨超级电容器的电化学测试.
主要成果:
- 所有的IL都表现出高热稳定性,低玻璃过渡温度和宽的电化学稳定性窗口.
- 与基于Morph的IL相比,基于Pyrr的IL显示出更快的阴离子和离子扩散.
- 基于Pyrr的ILs在1mVs-1时达到164Fg-1的特定电容,功率密度为609W kg-1和能量密度为27Wh kg-1在90°C.
结论:
- 基于pyrrolidinium的离子液体与酸离子是高温超级电容器的有希望的电解质.
- 阴离子的结构灵活性显著影响离子流动性和超级电容器性能.
- 这些IL为需要高工作温度的先进储能应用提供了可行的替代方案.
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