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:
May. 21, 2024
Filed:
Nov. 01, 2021
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Jun Suzuki, Ehime, JP;
Koji Yamaji, Ehime, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
A positive electrode active material containing a lithium metal composite oxide composed of secondary particles formed by aggregated primary particles, comprising lithium, at least one metal element and at least one additive element, the lithium metal composite oxide having a crystal structure of layered rock salt structure and the metal element including nickel in a content of 60 to 90 atomic percent and the additive element including boron in content of more than 1.0 atomic percent and 6.0 atomic percent or less, the nickel content and the boron content each with respect to the sum of the metal element and the additive element, the porosity of the secondary particles being 8% or more and 20% or less; a non-aqueous electrolyte secondary battery containing the positive electrode active material; and a process for producing the positive electrode active material.