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. 12, 2019
Filed:
Jan. 22, 2015
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Mitsuru Yamauchi, Ehime, JP;
Kazuomi Ryoshi, Ehime, JP;
Shuzo Ozawa, Ehime, JP;
Ryozo Ushio, Ehime, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
Obtaining cobalt hydroxide particles having a high filling property and a high density. The cobalt hydroxide particles used as a precursor for a positive electrode active material of a non-aqueous electrolyte secondary battery, including spherical secondary particles of flocculated primary particles, wherein average aspect ratio of the secondary particles is 0.7 or more, average particle diameter is 5 to 35 μm, and a value of (d90−d10)/MV indicating a dispersion of a particle size distribution is 0.6 or less, wherein, in sectional observation of the secondary particles, a ratio (N/L) of number (N) of gaps with maximum long diameter 0.3 μm or more recognized in particles of the secondary particles with sectional long diameter 3 μm or more to sectional long diameter (L) of the secondary particles is 1.0 or less, and also, maximum long diameter of the gaps is 15% or less of sectional long diameter of the secondary particles.