RT Journal Article
T1 Perspectives on Thermoelectric Energy Conversion in Ion-Exchange Membranes
A1 Barragán García, Vicenta María
A1 Kristiansen, Kim. R.
A1 Kjelstrup, Signe
AB 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.
PB MDPI
SN 1099-4300
YR 2018
FD 2018-12
LK https://hdl.handle.net/20.500.14352/13251
UL https://hdl.handle.net/20.500.14352/13251
LA eng
NO © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). This research was funded by the Research Council of Norway through its Centers of Excellence funding scheme, project number 262644, PoreLab.
NO Research Council of Norway through its Centers of Excellence fund scheme
DS Docta Complutense
RD 2 may 2024