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:
Feb. 13, 2018
Filed:
Mar. 04, 2014
Applicant:
Nec Corporation, Tokyo, JP;
Inventor:
Jiro Iriyama, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/38 (2006.01); H01M 10/052 (2010.01); H01M 10/0567 (2010.01); H01M 4/13 (2010.01); H01M 4/36 (2006.01); H01M 4/58 (2010.01); H01M 4/62 (2006.01); H01M 10/058 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/38 (2013.01); H01M 4/13 (2013.01); H01M 4/366 (2013.01); H01M 4/5815 (2013.01); H01M 10/052 (2013.01); H01M 10/0567 (2013.01); H01M 4/62 (2013.01); H01M 10/058 (2013.01); H01M 2004/028 (2013.01); H01M 2300/0025 (2013.01);
Abstract
The present invention relates to a lithium secondary battery, wherein a peak at 167 to 171 eV and a peak at 162 to 166 eV are present in XPS analysis of sulfur (S2p) of a positive electrode surface, and P169/P164 is in the range of 0.7 to 2.0 wherein the P 169/P 164 is the ratio between the intensity of the peak at 167 to 171 eV (P169) and the intensity of the peak at 162 to 166 eV (P164). The present invention can provide a lithium secondary battery having excellent cycle characteristics.