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:
Jun. 04, 2019
Filed:
Feb. 21, 2017
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Atsushi Sano, Tokyo, JP;
Keitaro Otsuki, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/62 (2006.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 4/505 (2010.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01); H01M 10/0569 (2010.01); H01M 4/131 (2010.01); H01M 4/13 (2010.01); H01M 4/38 (2006.01);
U.S. Cl.
CPC ...
H01M 4/628 (2013.01); H01M 4/13 (2013.01); H01M 4/131 (2013.01); H01M 4/364 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/5825 (2013.01); H01M 10/0525 (2013.01); H01M 10/0569 (2013.01); H01M 4/386 (2013.01);
Abstract
A lithium ion secondary battery includes: a positive electrode including a positive electrode active material layer; a negative electrode; and an electrolyte. The positive electrode active material layer contains Li(M)(PO)(M=VO or V, 0.9≤a≤3.3, 0.9≤b≤2.2, 0.9≤c≤3.3) as a first positive electrode active material, and additionally contains a fluorine compound of 1 to 300 ppm in terms of fluorine with respect to a weight of the positive electrode active material layer.