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:
Jul. 23, 2019
Filed:
Nov. 13, 2015
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Koji Yamaji, Niihama, JP;
Ryozo Ushio, Niihama, JP;
Takehide Honma, Niihama, JP;
Satoshi Yoshio, Niihama, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
A positive electrode active material for a nonaqueous electrolyte secondary battery contains lithium nickel cobalt zinc composite oxide represented by general formula (1): LiNiCoZnMO(0.95≤w≤1.10, 0.05≤x≤0.3, 0.005≤y≤0.08, and 0≤z≤0.3, where M is at least one metal element selected from the group consisting of Mg, Al, Ti, Mn, Fe, and Cu), wherein the lithium nickel cobalt zinc composite oxide has a form of secondary particles each corresponding to an aggregation of primary particles of hexagonal lithium-containing composite oxide with a layered structure, contains zinc oxide on at least a part of a surface of the primary particles and/or a surface of the secondary particles, and has a (003)-plane crystallite diameter of 100 nm or larger and 160 nm or smaller, the diameter being obtained by X-ray diffraction and the Scherrer equation.