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:
Aug. 18, 2015
Filed:
Dec. 03, 2010
Applicants:
Atsuo Yamada, Bunkyo-ku, JP;
Shinichi Nishimura, Bunkyo-ku, JP;
Ryuichi Natsui, Yokohami, JP;
Inventors:
Assignee:
The University of Tokyo, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 25/42 (2006.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/58 (2010.01);
U.S. Cl.
CPC ...
H01M 10/0525 (2013.01); C01B 25/42 (2013.01); H01M 4/5825 (2013.01); Y02E 60/122 (2013.01);
Abstract
To provide a positive electrode active material containing a pyrophosphate compound, ensuring that mixing of impurities is easily prevented to facilitate the synthesis and a high capacity battery is obtained, and a lithium ion battery using the positive electrode material. That is, the present invention relates to a pyrophosphate compound represented by the formula: LiMFePO(wherein M represents one or more elements selected from Mn, Zr, Mg, Co, Ni, V and Cu, and 0.3≦x≦0.9).