Next Article in Journal
New Trends in Statistical Physics of Complex Systems
Previous Article in Journal
A New Entropy-Based Atrial Fibrillation Detection Method for Scanning Wearable ECG Recordings
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessReview
Entropy 2018, 20(12), 905;

Perspectives on Thermoelectric Energy Conversion in Ion-Exchange Membranes

Department of Structure of Matter, Thermal Physics and Electronics; Complutense University of Madrid, 28040 Madrid, Spain
PoreLab, Department of Chemistry, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
Author to whom correspondence should be addressed.
Received: 29 October 2018 / Revised: 21 November 2018 / Accepted: 22 November 2018 / Published: 26 November 2018
(This article belongs to the Section Entropy Reviews)
Full-Text   |   PDF [741 KB, uploaded 27 November 2018]   |  


By thermoelectric power generation we mean the creation of electrical power directly from a temperature gradient. Semiconductors have been mainly used for this purpose, but these imply the use of rare and expensive materials. We show in this review that ion-exchange membranes may be interesting alternatives for thermoelectric energy conversion, giving Seebeck coefficients around 1 mV/K. Laboratory cells with Ag|AgCl electrodes can be used to find the transported entropies of the ions in the membrane without making assumptions. Non-equilibrium thermodynamics can be used to compute the Seebeck coefficient of this and other cells, in particular the popular cell with calomel electrodes. We review experimental results in the literature on cells with ion-exchange membranes, document the relatively large Seebeck coefficient, and explain with the help of theory its variation with electrode materials and electrolyte concentration and composition. The impact of the membrane heterogeneity and water content on the transported entropies is documented, and it is concluded that this and other properties should be further investigated, to better understand how all transport properties can serve the purpose of thermoelectric energy conversion. View Full-Text
Keywords: ion-exchange membrane; thermoelectric power; transported entropy ion-exchange membrane; thermoelectric power; transported entropy

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Barragán, V.M.; Kristiansen, K.R.; Kjelstrup, S. Perspectives on Thermoelectric Energy Conversion in Ion-Exchange Membranes. Entropy 2018, 20, 905.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Entropy EISSN 1099-4300 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top