Tunable Ferrites as Environmentally Friendly Materials for Energy‐Efficient Processes

Novel materials and methods of synthesis in the field of energy conversion and economy are reported. The main goal is to prepare and characterize Li(4 − x)Mn(5 − 2x)Fe3xO12 compounds. These compounds crystallize in a spinel-type structure, AB2O4, in which the cationic location in the A and B sublattices drives the potential application of these materials in two current prominent research fields: magnetic refrigeration and lithium batteries. This solid solution is revealed as a tunable system that nicely permits a specific response to be highlighted, depending on the composition and particle size: the magnetocaloric effect or active electrochemical behavior.