METHOD FOR PRODUCING LITHIUM IRON PHOSPHATE
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United States of America Patent
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Issued Date -
Nov 22, 2012
app pub date -
Dec 24, 2010
filing date -
Jan 14, 2010
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Abstract
A method of producing lithium iron phosphate includes adding iron particles containing 0.5 mass % or more of oxygen to an aqueous solution containing a phosphoric acid, a carboxylic acid and a lithium source, and causing components contained in the aqueous solution and the iron particles to react with each other under an oxidizing atmosphere and thereby form a reaction liquid; drying the reaction liquid to form a lithium iron phosphate precursor; and baking the lithium iron phosphate precursor under a non-oxidizing atmosphere to obtain the lithium iron phosphate.
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