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. 02, 2021
Filed:
May. 22, 2017
Sumitomo Chemical Company, Limited, Tokyo, JP;
Tomohiro Sakai, Tokyo, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Abstract
To provide a cathode active material with which it is possible to obtain a lithium ion secondary battery having a high discharge capacity and being excellent in the cycle characteristic, and its production process. A cathode active material, comprising particles of a lithium-containing composite oxide, the lithium-containing composite oxide being represented by LiNiCoMnTiMOwherein α is from 1 to 1.8, a is from 0.15 to 0.5, b is from 0 to 0.09, c is from 0.33 to 0.8, d is from 0.01 to 0.1, e is from 0 to 0.1, δ is from 0 to 0.8, a+b+c+d+e=1, and M is Mg, Al, Ca or the like, wherein in an X-ray diffraction pattern, the ratio (H/H) of the height of a peak of (020) plane assigned to a crystal structure with space group C2/m to the height of a peak of (003) plane assigned to a crystal structure with space group R-3m is at least 0.02, and D/Dis at most 4.