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. 08, 2013
Filed:
May. 01, 2007
Positive electrode active material and non-aqueous electrolyte secondary battery containing the same
Applicants:
Tsutomu Ohzuku, Nara, JP;
Hiroshi Yoshizawa, Hirakata, JP;
Masatoshi Nagayama, Hirakata, JP;
Inventors:
Assignees:
Panasonic Corporation, Osaka, JP;
Osaka City University, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01D 1/02 (2006.01); C01G 53/04 (2006.01); C01G 45/12 (2006.01); H01M 4/13 (2010.01); H01M 4/58 (2010.01); H01M 4/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a positive electrode active material comprising a lithium-containing composite oxide containing nickel with an oxidation state of 2.0 to 2.5 and manganese with an oxidation state of 3.5 to 4.0, the oxidation state determined by the shifts of energy at which absorption maximum is observed in the X-ray absorption near-K-edge structures, and to a non-aqueous electrolyte secondary battery using the same, the positive electrode active material being characterized in having a high capacity, a long storage life and excellent cycle life.