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:
Mar. 22, 2022
Filed:
May. 05, 2017
Hajime Hasegawa, Susono, JP;
Keisuke Omori, Kariya, JP;
Masato Hozumi, Mishima, JP;
Masashi Kodama, Hadano, JP;
Takumi Tanaka, Susono, JP;
Hideki Yoshida, Tokushima, JP;
Masato Sonoo, Komatsushima, JP;
Yuuki Maeda, Anan, JP;
Hajime Hasegawa, Susono, JP;
Keisuke Omori, Kariya, JP;
Masato Hozumi, Mishima, JP;
Masashi Kodama, Hadano, JP;
Takumi Tanaka, Susono, JP;
Hideki Yoshida, Tokushima, JP;
Masato Sonoo, Komatsushima, JP;
Yuuki Maeda, Anan, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Nichia Corporation, Anan, JP;
Abstract
A cathode active material with high durability and a lithium ion secondary battery. The cathode active material is a cathode active material represented by a general formula LiNiCoMnWO(−0.05≤a≤0.2, x=1−y−z−t, 0≤y<1, 0≤t<1, 0<t≤0.03), wherein the cathode active material satisfies the following formula (1):σ1/1≤0.92  (1)where t1 is an element concentration average of insides and grain boundaries of primary particles of a W element, and σ1 is an element concentration standard deviation of the insides and grain boundaries of the primary particles of the W element.