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:
Nov. 17, 2020
Filed:
Jan. 22, 2014
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Hideyuki Saka, Toyota, JP;
Shuhei Oda, Niihama, JP;
Tetsutaro Hayashi, Niihama, JP;
Hiroyuki Toya, Niihama, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
A positive electrode active material for lithium secondary batteries disclosed herein comprises a lithium transition metal oxide of a layered structure, represented by formula LiNiCoMnCaMO(where −0.05≤α≤0.2, x+y+z+β+γ≅1, 0.3≤x≤≤0.7, 0.1≤y≤0.4, 0.1≤z≤0.4, 0.0002≤β≤0.0025, 0.0002≤β+γ≤0.02, and in a case where γ>0, M is absent or represents one, two or more elements selected from the group consisting of Na, Mg, Al, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W). The tap density of the positive electrode active material ranges from 1.8 to 2.5 g/cm.