在不压缩的液体电解质中运输的基于体积的描述及其对离子液体的应用
Franziska Kilchert1,2, Martin Lorenz3, Max Schammer1,2
1German Aerospace Center, Wilhelm-Runge-Straße 10, 89081 Ulm, Germany. birger.horstmann@dlr.de.
Physical chemistry chemical physics : PCCP
|August 30, 2023
概括
了解电解质运输参数对于电池性能至关重要. 这项研究引入了一个基于体积的参考框架,改进了像离子液体这样的缩电解质中转移数的解释.
科学领域:
- 物理化学 物理化学
- 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:
- 转移数是电解质动态和电池性能的关键.
- 在缩的电解质 (如离子液体) 中测量这些参数具有挑战性.
- 转移数的解释是有争议的,因为语言和参考框架使其复杂化.
研究的目的:
- 澄清参考框架在解释运输参数中的作用.
- 介绍一种新的,高相关性电解质的热力学上一致的理论.
- 应用基于体积的漂移速度作为不可压缩电解质的参考框架.
主要方法:
- 开发了高度相关的电解质的一般理论框架.
- 使用基于体积的漂移速度,强调局部体积的保存.
- 应用框架来分析电泳核磁共振 (eNMR) 实验.
主要成果:
- 基于体积的描述准确地解释了在离子液体电解质中的eNMR测量.
- 广泛使用的质量中心参考框架显示了这些系统的局限性.
- 证明了局部运动量保护对于这些电解质在宏观尺度上是不有效的.
结论:
- 基于体积的参考框架对于准确解释缩电解质中的传输参数至关重要.
- 这些发现挑战了通常在模拟中使用的质量中心框架的适用性.
- 这项工作为了解电池中的电解质行为提供了更强大的理论基础.
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