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<p>The interaction modes of water with (polar) solids are manifold, comprising surface adsorption and incorporation into the bulk, both in molecular and in dissociated form. This Review discusses these processes and the respective pronounced effects on the ionic transport properties. The concentration as well as the mobility of ionic carriers can vary by orders of magnitude depending on the water content on or within a solid. Selected materials examples, which are relevant for electrochemical devices (for example, low- and intermediate-temperature fuel cells) or which are of fundamental interest (such as molecular water acting as dopant in a lithium halide), are treated in more detail. Interrelations between hydration and electronic defects are also briefly touched upon.</p>

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Water uptake of solids and its impact on ion transport

  • 期刊论文

  • 发表日期：

    2025年3月31日

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  • Markus Joos,
  • Xiaolan Kang,
  • Rotraut Merkle,
  • Joachim Maier

摘要

The interaction modes of water with (polar) solids are manifold, comprising surface adsorption and incorporation into the bulk, both in molecular and in dissociated form. This Review discusses these processes and the respective pronounced effects on the ionic transport properties. The concentration as well as the mobility of ionic carriers can vary by orders of magnitude depending on the water content on or within a solid. Selected materials examples, which are relevant for electrochemical devices (for example, low- and intermediate-temperature fuel cells) or which are of fundamental interest (such as molecular water acting as dopant in a lithium halide), are treated in more detail. Interrelations between hydration and electronic defects are also briefly touched upon.