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. 25, 2020
Filed:
Dec. 11, 2015
Envision Aesc Japan Ltd., Zama-shi, Kanagawa, JP;
Sohei Suga, Zama, JP;
Koichi Shinohara, Zama, JP;
Kenji Ohara, Zama, JP;
Toshihiro Horiuchi, Zama, JP;
Masanori Aoyagi, Zama, JP;
Junko Nishiyama, Zama, JP;
ENVISION AESC JAPAN LTD., Kanagawa, JP;
Abstract
A lithium ion secondary battery includes: a negative electrode having a carbon-based negative electrode material containing graphite particles and amorphous carbon particles; and a positive electrode including a lithium composite oxide. The lithium composite oxide is represented by a general formula: LiNiMnCoO, where x is a numeral of 1 or more and 1.2 or less, and y and z are positive numerals satisfying the relation of y+z<1. The lithium composite oxide has a layer crystal structure and has a median particle diameter (D50) of 4.0 μm or more and less than 6.0 μm.