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Lithium manganese oxides as high-temperature thermal energy storage system

TitoloLithium manganese oxides as high-temperature thermal energy storage system
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2016
AutoriVarsano, F., Alvani C., La Barbera A., Masi A., and Padella F.
RivistaThermochimica Acta
Parole chiaveEnergy storage, Energy storage systems, Heat storage, High temperature applications, High temperature effects, High temperature materials, High temperature thermal energy storages, Lithium, Lithium manganese oxide, Manganese, Manganese oxide, oxidation, Oxidation and reduction, Oxides, Preliminary information, Reaction kinetics, Reversible oxidation, Solid state transformations, Storage (materials), Thermal energy, Thermochemistry, Thermodynamic stability

The reversible oxidation of LiMnO2 to LiMn2O4 and Li2MnO3 coexisting phases has been investigated in view of its possible application as high temperature energy storage system. By means of thermoanalytical techniques information regarding the heat exchanged during both oxidation and reduction reactions have been collected and the temperature range for cyclic reduction–oxidation has been explored. Initial tests regarding the cyclical operation highlight the optimal thermal stability of the mixture confirming the exploitability of the system for high temperature thermal energy storage applications. Preliminary information concerning the kinetic behavior of the powder during the reduction stage evidences a two-step mechanism. The reaction can be described through a first stage characterized by oxygen depletion from the spinel phase, followed by a major oxygen loss concomitant with the depleted LiMn2O4 and Li2MnO3 solid state transformation into LiMnO2. © 2016 Elsevier B.V.


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Citation KeyVarsano201626