Nanostructured and porous antimony-doped tin oxide as electrode material for the heat-to-electricity energy conversion in thermo-electrochemical cells
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comunitat-uji-handle2:10234/7034
comunitat-uji-handle3:10234/8619
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Título
Nanostructured and porous antimony-doped tin oxide as electrode material for the heat-to-electricity energy conversion in thermo-electrochemical cellsFecha de publicación
2024-02-25Editor
ElsevierCita bibliográfica
CASTRO-RUIZ, Sergio; GARCÍA-CAÑADAS, Jorge. Nanostructured and porous antimony-doped tin oxide as electrode material for the heat-to-electricity energy conversion in thermo-electrochemical cells. Electrochemistry Communications, 2024, p. 107683.Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Thermo-electrochemical cells (or thermogalvanic cells or thermocells, TECs) have gained attention as devices able to convert low temperature heat into electricity. Within TECs, Pt is one of the most employed electrodes, ... [+]
Thermo-electrochemical cells (or thermogalvanic cells or thermocells, TECs) have gained attention as devices able to convert low temperature heat into electricity. Within TECs, Pt is one of the most employed electrodes, since it exhibits a fast transfer of electrons with the redox couple in the electrolyte. However, its high price represents a serious drawback. Here, we analyze the use of nanostructured and porous antimony-doped tin oxide (Sb:SnO2) as electrode material. Electrodes of different thickness (320, 550 and 1550 nm) were fabricated by spin coating to study the effect of the electrode area in contact with the electrolyte. F:SnO2 (FTO) glass was used as a substrate and the typical 0.4 M potassium ferro/ferricyanide aqueous solution served as electrolyte. An impedance spectroscopy analysis under operating conditions (10 K temperature difference) showed that the Sb:SnO2 electrodes exhibit the same excellent kinetics as Pt for all the different thickness. On the other hand, the power output density was thickness independent, since the temperature coefficients and the series and mass-transport resistances were similar, leading to no performance improvements when the electrode area in contact with the electrolyte was significantly increased. Finally, the Carnot-related efficiencies estimated for the Sb:SnO2 cells were in the same order of magnitude as for Pt electrodes. These results open the possibility to use Sb:SnO2 as a suitable electrode in TECs at low cost. [-]
Entidad financiadora
European Union Horizon 2020 Research and Innovation Programme
Código del proyecto o subvención
863222
Título del proyecto o subvención
UncorrelaTEd project
Derechos de acceso
© 2024 The Authors. Published by Elsevier B.V.
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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