HYDROTHERMAL PROCESS FOR THE PRODUCTION OF LIFEPO4 POWDER

摘要

The present invention relates to a process for the preparation of an organic surfactant comprising the steps of: a) providing an aqueous solution of an organic surfactant; b) providing an aqueous solution of an iron (II) salt and mixing an aqueous solution of the iron (II) salt with an aqueous solution of phosphate to form an iron (II) salt / salt having a stoichiometric ratio of Fe ²⁺ : Providing a phosphate mixture solution; c) adding said iron (II) salt / phosphate mixed solution to said surfactant solution with continuous stirring; d) providing an aqueous solution comprising a lithium salt, and adding an aqueous solution comprising the lithium salt to the iron (II) salt / phosphate mixed solution to form an aqueous solution comprising about 1: 1: 3 Fe ²⁺ : Providing a mixture having a stoichiometric ratio, and stirring the resulting mixture; e) heating the resultant mixture at 80-200 占 폚; f) washing the precipitate obtained to remove excess surfactant, filtering and drying the precipitate; And g) provide a method for producing LiFePO ₄ powder comprising the step of heat-treating the dried precipitate is fired at 550-850 ℃ for at least 2 hours in an inert atmosphere, the co-solvent in this step (a) to (d) , Or after any one of the steps.