LiFePO_4 seems to be an excellent candidate as a cathode material for the next generation of lithium-ion batteries. A well controlled synthesis is necessary to ensure the highest performances by avoiding the grain growth. Syntheses are performed on a continuous hydrothermal reactor which allows to work from subcritical to supercritical water conditions. By offering a low viscosity, a great reactivity and a fast nucleation, nanometric powders can be produced. The as-prepared materials are fully characterized by X-Ray diffraction, surface area measurements and electron microscopy. Thus composition, particle size, morphology and aggregation state are studied. The electrochemical behaviour is studied in relation to the powders characteristics. Finally an experimental design is conducted in order to understand the influence of the experimental parameters on the final material, and to define the optimal working area.
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