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. 02, 2016
Filed:
Apr. 27, 2015
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Rei Kokado, Tokyo, JP;
Kensaku Mori, Tokyo, JP;
Abstract
Provided is a method for manufacturing the positive electrode active material for nonaqueous electrolyte secondary batteries, the method comprising: a first step, wherein an alkaline solution with a tungsten compound dissolved therein is added to and mixed with a lithium metal composite oxide powder represented by a general formula LizNi1—x—yCoxMyO2 (wherein, 0.10≦x≦0.35, 0≦y≦0.35, 0.97≦Z≦1.20, and M is at least one element selected from Mn, V, Mg, Mo, Nb, Ti, and Al), including primary particles and secondary particles composed of aggregation of the primary particles, and thereby W is dispersed on a surface of the primary particles; and a second step, wherein, by heat treating the mixture of the alkaline solution with the tungsten compound dissolved therein and the lithium metal composite oxide powder, fine particles containing W and Li are formed on a surface of the primary particles.