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Ion mobility in concentrated electrolytes studied by ac-impedance: an experimental approach for measuring membrane potentials

机译:通过交流阻抗研究浓电解质中的离子迁移率:一种测量膜电位的实验方法

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摘要

In this work, the ac-impedance of electrolytes contained in long tubes connecting two blocking electrodes is explored as a method to measure the ion mobility of aqueous solutions of salts of the oceanic system (Na-K-Ca-Mg-Cl-SO_4-H_2O) in a wide concentration range. Different physical models to be used for computing the density and the mobility of ions from the impedance spectra are discussed. It is shown, that models fail in describing the low frequency behavior, dominated by the dynamic of the space charge layer at the electrode surface, which contains information about the density of mobile charge carriers. A semi-empirical procedure is proposed.
机译:在这项工作中,探索了连接两个阻塞电极的长管中包含的电解质的交流阻抗,作为测量海洋系统盐水溶液(Na-K​​-Ca-Mg-Cl-SO_4-的离子迁移率的方法) H_2O)的浓度范围很广。讨论了用于从阻抗谱计算离子的密度和迁移率的不同物理模型。结果表明,模型无法描述低频行为,而低频行为主要受电极表面空间电荷层的动态影响,其中包含有关移动电荷载流子密度的信息。提出了一个半经验过程。

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  • 来源
  • 会议地点 San Diego(US)
  • 作者

    R. Pattnaik; A.G. Munoz;

  • 作者单位

    Department for Process Analysis, Gesellschaft fuer Anlagen und Reaktorsicherheit GRS gGmbH, 38122 Braunschweig , Germany;

    Department for Process Analysis, Gesellschaft fuer Anlagen und Reaktorsicherheit GRS gGmbH, 38122 Braunschweig , Germany;

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  • 正文语种 eng
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