Assessing Cr incorporation in Mn2O3/Mn3O4 redox materials for thermochemical heat storage applications

Widening the use of renewable sources requires more efficient energy storage systems to overcome inherent intermittence solar energy. In this respect, thermal coupled concentrated power represents an inexpensive technology achieve that goal. particular, reversible thermochemical reactions is promising due a higher density if compared with commercial sensible heat on molten salts. However, some these rely gas-solid can suffer cycle-to-cycle loss activity slow kinetics and materials degradation, which detrimental for its potential future commercialization. work, we have assessed incorporation Cr cations in redox couple Mn2O3/Mn3O4, as way stabilize multi-cyclic over prolonged operation at high temperatures (650-1000 °C). Reduction has been studied situ XRD kinetic analyses, confirm shifts reaction towards temperatures. Long term cycling tests 5% helps Mn2O3/Mn3O4.