Understanding the transient ion transport behavior at phase transition temperatures

The coupled thermoconductometric measurement reveals the strong contrast between the conductive and thermal behaviors of an electrolyte during phase transition.

In this work we clarified a fundamental question of high importance but often neglected: how the ion transport behavior of electrolytes change during phase transition. The quantitative understanding of such transient behavior has profound impact on how to accurately define and predict electrolyte applications in extreme environments.

  • The synchronized results of conductivity and temperature differential thus obtained revealed that while the differential temperature signal at a phase transition was always pronounced, the corresponding change in apparent conductivity could be deceptively unremarkable and easily escape notice.
  • The insensitivity of ion transport has already led to erroneous estimation for the temperature limits of the electrolytes.

 

  • The work sets the guideline for quantitative prediction of electrolyte properties at extreme temperatures.

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DOI: 10.1021/acs.jpcc.1c07057

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