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:
Jan. 05, 2021
Filed:
Dec. 10, 2018
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Takayuki Ishikawa, Osaka, JP;
Ryuichi Natsui, Osaka, JP;
Issei Ikeuchi, Osaka, JP;
Kensuke Nakura, Osaka, JP;
Abstract
A positive electrode active material includes a lithium composite oxide and a covering material that covers a surface of the lithium composite oxide. The covering material has an electron conductivity of 10S/m or less. The lithium composite oxide is a multiphase mixture including a first phase having a first crystal structure that belongs to a space group Fm-3m and a second phase having a second crystal structure that belongs to a space group other than a space group Fm-3m. The ratio I/Iof a first integrated intensity Iof a first maximum peak present at a first diffraction angle 2θ of 18° or more and 20° or less to a second integrated intensity Iof a second maximum peak present at a second diffraction angle 2θ of 43° or more and 46° or less in an XRD pattern of the lithium composite oxide satisfies 0.05≤I/I≤0.90.