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, 2019
Filed:
Oct. 20, 2015
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
Disclose herein are processes for producing a nickel cobalt aluminum composite hydroxide and producing a positive electrode active material for non-aqueous electrolyte secondary batteries. Nucleation is performed by controlling an aqueous solution for nucleation containing a nickel-containing metal compound, cobalt-containing metal compound, ammonium ion supplier, and aluminum source so that the aqueous solution's pH for nucleation is 12.0 to 13.4, and then in a particle growth step, particle growth is performed in an aqueous solution for particle growth obtained by controlling the aqueous solution for nucleation obtained in the nucleation step so that the pH of aqueous solution for nucleation is 10.5 to 12.0. Further, in nucleation step, an aqueous solution containing aluminum and sodium is used as the aluminum source contained in aqueous solution for nucleation, and the mole ratio of sodium to aluminum in aqueous solution containing aluminum and sodium is adjusted to 1.5 to 3.0.