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:
Nov. 21, 2017
Filed:
Dec. 17, 2013
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Hideaki Seki, Tokyo, JP;
Atsushi Sano, Tokyo, JP;
Masaki Sobu, Tokyo, JP;
Tomoshi Nakamoto, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 4/58 (2010.01); C01B 25/45 (2006.01); H01M 10/052 (2010.01);
U.S. Cl.
CPC ...
H01M 4/5825 (2013.01); C01B 25/45 (2013.01); H01M 10/052 (2013.01);
Abstract
A positive electrode active material contains a compound represented by a chemical formula LiVOPO. A crystal system of the compound is an orthorhombic system, and the amount of tetravalent V of the compound is 27.7 mass % or more and 28.2 mass % or less.