The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2017
Filed:
Feb. 15, 2013
Applicant:
Murata Manufacturing Co., Ltd., Nagaokakyo-Shi, Kyoto-fu, JP;
Inventor:
Yuji Kintaka, Nagaokakyo, JP;
Assignee:
MURATA MANUFACTURING CO., LTD., Nagaokakyo-Shi, Kyoto-Fu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 4/136 (2010.01); C01B 25/37 (2006.01); C01B 25/45 (2006.01); H01M 4/1397 (2010.01); H01M 4/58 (2010.01); H01M 10/052 (2010.01);
U.S. Cl.
CPC ...
H01M 4/136 (2013.01); C01B 25/37 (2013.01); C01B 25/45 (2013.01); H01M 4/1397 (2013.01); H01M 4/5825 (2013.01); H01M 10/052 (2013.01); Y02E 60/122 (2013.01); Y02P 70/54 (2015.11);
Abstract
A mixed aqueous solution is prepared in which a phosphorus source, a divalent Fe compound, and an oxidant are mixed at a predetermined ratio. Then, this mixed aqueous solution is dropwise added into a buffer solution having a pH value of 1.5 to 9, thereby to produce a precipitated powder of FePO. This FePOis synthesized with a lithium compound to obtain LiFePO. An electrode active substance containing this LiFePOas a major component is used as a positive electrode material of a secondary battery.