High-temperature thermochemical energy storage based on redox reactions using Co-Fe and Mn-Fe mixed metal oxides

Abstract : Metal oxides are potential materials for thermochemical heat storage via reversible endothermal/exothermal redox reactions, and among them, cobalt oxide and manganese oxide are attracting attention. The synthesis of mixed oxides is considered as a way to answer the drawbacks of pure metal oxides, such as slow reaction kinetics, loss-in-capacity over cycles or sintering issues, and the materials potential for thermochemical heat storage application needs to be assessed. This work proposes a study combining thermodynamic calculations and experimental measurements by simultaneous thermogravimetric analysis and calorimetry, in order to identify the impact of iron oxide addition to Co and Mn-based oxides. Fe addition decreased the redox activity and energy storage capacity of Co3O4/CoO, whereas the reaction rate, reversibility and cycling stability of Mn2O3/Mn3O4 was significantly enhanced with added Fe amounts above ~15 mol%, and the energy storage capacity was slightly improved. The formation of a reactive cubic spinel explained the improved re-oxidation yield of Mn-based oxides that could be cycled between bixbyite and cubic spinel phases, whereas a low reactive tetragonal spinel phase showing poor re-oxidation was formed below 15 mol% Fe. Thermodynamic equilibrium calculations predict accurately the behavior of both systems. The possibility to identify other suitable mixed oxides becomes conceivable, by enabling the selection of transition metal additives for tuning the redox properties of mixed metal oxides destined for thermochemical energy storage applications.
Type de document :
Article dans une revue
Journal of Solid State Chemistry, Elsevier, 2017, 253, pp.6 - 14. 〈10.1016/j.jssc.2017.05.015〉
Domaine :
Liste complète des métadonnées

Littérature citée [17 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-01786111
Contributeur : Olivier Dezellus <>
Soumis le : vendredi 20 juillet 2018 - 11:34:10
Dernière modification le : mardi 13 novembre 2018 - 01:08:55
Document(s) archivé(s) le : dimanche 21 octobre 2018 - 17:49:57

Fichier

Andre_20472.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Citation

Laurie André, Stéphane Abanades, Laurent Cassayre. High-temperature thermochemical energy storage based on redox reactions using Co-Fe and Mn-Fe mixed metal oxides. Journal of Solid State Chemistry, Elsevier, 2017, 253, pp.6 - 14. 〈10.1016/j.jssc.2017.05.015〉. 〈hal-01786111〉

Partager

Métriques

Consultations de la notice

66

Téléchargements de fichiers

41