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:
Aug. 11, 2020
Filed:
Dec. 12, 2014
Santoku Corporation, Kobe-shi, Hyogo, JP;
Motofumi Matsuda, Kobe, JP;
SANTOKU CORPORATION, Kobe-shi, Hyogo, JP;
Abstract
Provided is cathode active material powder or a cathode that is capable of improving the cycle characteristics of nonaqueous electrolyte rechargeable batteries at high voltage and exhibiting excellent capacity retention. The powder has a composition of: LiNaCoMO(0.950≤x≤1.100, 0<y≤0.050, −0.1≤z≤0.1, 0≤w≤0.020; M: rare earth elements, Ti, Zr, Mo, Mn, Ni, Cu, Al, Ga, etc), and a core-shell structure composed of a lithium-containing composite oxide region as core and a Li-ion-conductive oxide region as shell. The core contains Li, Co, and oxygen, and has Co concentration of not higher than 90% as calculated by formula: ((Co concentration on shell external surface)/(Co concentration at shell boundary of core/shell structure))×100. The shell is an amorphous layer containing La, Ti, Co, and oxygen, covering the core at least partly.