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:
Sep. 19, 2017
Filed:
Oct. 12, 2013
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Katsuya Kase, Ehime, JP;
Ryuichi Kuzuo, Ehime, JP;
Minoru Shiraoka, Ehime, JP;
Hideo Sasaoka, Ehime, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Abstract
A coated nickel hydroxide powder that has a cobalt compound coating having improved uniformity and adhesion properties on the surface of particles thereof and is therefore suitable for a positive electrode active material of an alkaline secondary battery is obtained by coating the surface of nickel hydroxide particles with a cobalt compound, and has a transmittance ratio of 30% or higher as determined by (A−B)/(B−B). The transmittance A (coated nickel hydroxide powder), the transmittance B(nickel hydroxide powder), or the transmittance B(nickel hydroxide powder and cobalt compound containing cobalt in an amount corresponding to the amount of cobalt contained in the coating) can be determined by measuring the transmittance of a tubular transparent cell after shaking the tightly-closed transparent cell containing each powder for a certain time and then taking the contents out of the transparent cell.