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:
May. 02, 2017
Filed:
Apr. 16, 2013
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Tetsuya Mitsumoto, Takehara, JP;
Hitohiko Ide, Takehara, JP;
Shinya Kagei, Takehara, JP;
Yoshimi Hata, Takehara, JP;
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Abstract
Provided is a lithium metal compound oxide having a layered structure, which is very excellent as a positive electrode active material of a battery that is mounted on, particularly, an electric vehicle or a hybrid vehicle. Suggested is a lithium metal compound oxide having a layered structure which is expressed by general formula of LiMO(M represents metal elements including three elements of Mn, Co, and Ni). In the lithium metal compound oxide having a layered structure, D50 is more than 4 μm and less than 20 μm, a ratio of a primary particle area to a secondary particle area of secondary particles having a size corresponding to the D50 ('primary particle area/secondary particle area') is 0.004 to 0.035, and the minimum value of powder crushing strength that is obtained by crushing a powder using a microcompression tester is more than 70 MPa.