Patent ID: 9133029
Filing Date: 2015-09-15
Classification: C01B,C01D

Abstract:
1. A method for making lithium iron phosphate, comprising: reacting an alkali with a ferric salt in water to form a red colored ferric hydroxide precipitate in the water; mixing the red colored ferric hydroxide precipitate with deionized water, organic solvent, and emulsifier to form a water-in-oil emulsion; adding phosphoric acid solution and iron metal powder to the water-in-oil emulsion to form ferrous hydrogen phosphate; introducing a lithium source to the water-in-oil emulsion and reacting the lithium source with the ferrous hydrogen phosphate to form a precursor in the water-in-oil emulsion; and heating the precursor in a protective gas at a heating temperature in a range from about 600° C. to about 800° C. to form lithium iron phosphate.