Thermochemical heat storage at high temperature

A and B site Co-doping of CaMnO3: a route to enhanced heat storage properties

“…Other investigated doped redox systems, namely La x Sr 1− x (Mn,Fe,Co)O 3− δ , 54 and Ba y Sr 1− y CoO 3− δ , 54 show lower heat storage capacity than LCFM5 (and CMF10). Stoichiometric metal oxides, 55 such as Co 3 O 4 /CoO (844 kJ kg −1 ), 56 BaO 2 /BaO (474 kJ kg −1 ) 57 and Mn 2 O 3 /Mn 3 O 4 (202 kJ kg −1 ), 58 offer higher gravimetric energy storage capacity, but as noted above, the redox reactions of these materials are discrete. Consequently, heat release is limited to the specific temperature of the reaction, which in many instances is lower than desirable.…”

Deagglomeration Phosphorus Doping in Ferromanganese Oxide for Thermochemical Energy Storage

“…Energy crisis and environmental pollution are the most concerning issues of the 21st century; the current global drives are toward renewable energy sources , or waste reduction. , Thermal energy storage technology can be categorized into three main types: sensible heat storage, latent heat storage, and TCES. TCES utilizes reversible reactions that involve heat absorption and release, such as redox reactions, to effectively store heat energy. − The most widely studied metal oxides are the BaO 2 /BaO system, Co 3 O 4 /CoO system, , CuO/Cu 2 O system, , perovskite oxide, − ferromanganese oxide, − and copper manganese oxide. , Of these options, ferromanganese oxide is favored due to its operational window of 750 to 1000 °C. However, during the circulation process, sintering of large particles and agglomeration of small and large particles may occur, leading to reduced efficiency of the reaction …”

Thermodynamic and Structural Effects of Fe Doping in Magnesium Manganese Oxides for Thermochemical Energy Storage

“…A variety of TCES materials have been previously studied, including metallic hydrides, , hydroxides, carbonates, − and metal oxide materials. ,− The metal oxide materials are compatible with high-temperature power cycles and are operable in an open loop system, eliminating the reactant gas storage needed for the other systems . Mn 3 O 4 /Mn 2 O 3 was one of the earliest proposed metal oxide TCES systems because of its high reduction temperatures and its low cost and toxicity .…”