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. 22, 2022
Filed:
Jul. 02, 2020
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Daiichi Kigenso Kagaku Kogyo Co., Ltd., Osaka, JP;
Ryuta Sugiura, Toyota, JP;
Daisuke Horikawa, Toyota, JP;
Sadahiro Yagishita, Osaka, JP;
Taku Nishikawa, Osaka, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
DAIICHI KIGENSO KAGAKU KOGYO CO., LTD., Osaka, JP;
Abstract
A non aqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material, a negative electrode, and a non aqueous electrolyte, and the positive electrode active material includes a positive electrode active material particle containing a lithium transition metal compound, and a coating portion coating at least a part of a surface of the positive electrode active material particle. The coating portion contains a lithium ionic conductor containing lithium, a phosphoric acid group, and yttrium. The lithium ionic conductor includes a region A in which a ratio of yttrium is relatively rich and a region B in which the ratio of yttrium is relatively poor.