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:
Oct. 08, 2024
Filed:
Jul. 22, 2014
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Hiroyuki Toya, Ehime, JP;
Masahiro Morita, Aichi, JP;
Hiroki Nagai, Aichi, JP;
Yoshinari Makimura, Aichi, JP;
Tetsuro Kobayashi, Aichi, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi, JP;
Abstract
A cathode active material for a non-aqueous electrolyte secondary battery has improved output characteristics in low-temperature environment use. A lithium mixture includes composite hydroxide particles and a lithium compound calcined in an oxidizing atmosphere under a temperature rising time from 650° C. to a calcination temperature set to 0.5-1.5 hours and the calcination temperature set to 850° C.-1000° C. and maintained for 1.0-5.0 hours. The material has the general formula (A): LiNiCoMnMO, where −0.05≤s≤0.20, x+y+z+t=1, 0.3≤x≤0.7, 0.1≤y≤0.4, 0.1≤z≤0.4, 0≤t≤0.05, and M is selected from Ca, Mg, Al, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W. The material includes hexagonal lithium composite oxide particles. The ratio of the crystallite size at plane (104) to plane (003) is greater than 0 and less than 0.60.