Electrochemical Methods of Transference Number Determination for Polymer Electrolyte Systems: A Comparative Study

Shaul Bublil, Gayathri Peta, Miryam Fayena-Greenstein, Hadas Alon-Yehezkel, Ortal Raskin, Yuval Elias, Doron Aurbach

Research output: Contribution to journalArticlepeer-review


The transference number for cations, t + , is one of the most important parameters for characterizing polymeric and/or composite solid electrolytes. It expresses the contribution of the positive charge carriers to the total conductivity, which in turn reflects the degree of polarization due to the negative carriers in the electrolyte systems. Four electrochemical methods based on different equations commonly used for obtaining t + are compared. A series of experiments were conducted with solid polymer electrolytes based on polyethylene oxide with and without TiO2 ceramic additive. Interestingly, the oldest method developed and presented four decades ago, emerges as the most simple, reliable, sensitive, repeatable, and stable option for determining t + values over time.

Original languageEnglish
Article number110523
JournalJournal of the Electrochemical Society
Issue number11
StatePublished - Nov 2022

Bibliographical note

Funding Information:
Partial financial support for this work was provided by the Israel Science Foundation (ISF) and the U.S.-Israel Binational Industrial Research and Development (BIRD) Foundation. SB thanks the Israeli Scholarship Education Foundation (ISEF) for excellence in academic and social leadership for a PhD scholarship. The authors declare no competing financial interests.

Publisher Copyright:
© 2022 The Electrochemical Society (“ECS”). Published on behalf of ECS by IOP Publishing Limited.


  • composite polymer electrolytes
  • polyethylene oxide
  • sodium batteries
  • solid electrolytes
  • transference numbers


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