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:
Apr. 21, 2020
Filed:
Jul. 06, 2015
Murata Manufacturing Co., Ltd., Kyoto, JP;
Yuki Niwata, Fukushima, JP;
Shingo Nakasato, Fukushima, JP;
Asuki Yanagihara, Fukushima, JP;
Yosuke Hosoya, Fukushima, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A positive electrode active material includes: a composite particle that includes a particle containing a lithium transition metal composite oxide of Li and Co and a layer that is provided on a surface of the particle and includes an oxide of Li, Ni and Mn. Ni and Mn have a concentration distribution centered on the center from a surface of the composite particle, in a depth range in which a ratio d (%) satisfies 0.04%≤d≤0.20%, a mole fraction rof Ni and a mole fraction rof Mn are within ranges of 0.05≤rand 0.05≤r, respectively, and a ratio r/rand a ratio r/rare within ranges of 0.85≤r/r≤1.0 and 0.85≤r/r≤1.0, respectively.