Title:
METHOD FOR PRODUCING LITHIUM IRON PHOSPHATE
Document Type and Number:
Japanese Patent JP2014201459
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a lithium iron phosphate particle for a lithium ion secondary battery positive electrode material which has a peel strength increased by improvement of a positive-electrode active material.SOLUTION: There can be obtained a lithium iron phosphate particle for a lithium ion secondary battery positive electrode material by the method comprising: an aqueous solution preparation step of preparing an aqueous solution containing a phosphoric acid and hydroxycarboxylic acid; a first preparation step of preparing a first reaction solution by adding iron particles containing 0.1 to 2 mass% of oxygen to the aqueous solution to react the phosphoric acid, the hydroxycarboxylic acid and the iron particles in the aqueous solution under an oxidizing atmosphere; a second preparation step of preparing a second reaction solution by adding a lithium source to the first reaction solution; a third preparation step of preparing a third reaction solution by adding a carbon source to the second reaction solution; a precursor preparation step of preparing a lithium iron phosphate precursor by drying the third reaction solution; and a burning step of burning the lithium iron phosphate precursor under a non-oxidizing atmosphere to obtain lithium iron phosphate.
More Like This:
Inventors:
TAWARA TOMOYUKI
Application Number:
JP2013076922A
Publication Date:
October 27, 2014
Filing Date:
April 02, 2013
Export Citation:
Assignee:
JFE CHEMICAL CORP
International Classes:
C01B25/45; H01M4/58
Attorney, Agent or Firm:
Kenji Sugimura
Kengo Yoshida
Kengo Yoshida