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:
Jul. 01, 2008
Filed:
Nov. 12, 2002
Ryuji Shiozaki, Tokyo, JP;
Akihiro Fujii, Osaka, JP;
Kazuya Okabe, Osaka, JP;
Toshiyuki Nukuda, Osaka, JP;
Ryuji Shiozaki, Tokyo, JP;
Akihiro Fujii, Osaka, JP;
Kazuya Okabe, Osaka, JP;
Toshiyuki Nukuda, Osaka, JP;
GS Yuasa Corporation, Minami-ku, Kyoto-shi, JP;
Abstract
A positive active material for lithium secondary batteries, includes a composite oxide including an oxide which is represented by the composite formula LiMnNiCoOand has an α-NaFeOstructure, and an impurity phase including LiMnO. The values a, b, and c are within such a range that in a ternary phase diagram showing the relationship among these, (a, b, c) is present on the perimeter of or inside the quadrilateral ABCD defined by point A (0.5, 0.5, 0), point B (0.55, 0.45, 0), point C (0.55, 0.15, 0.30), and point D (0.15, 0.15, 0.7) as vertexes, and 0.95<x/(a+b+c)<1.35.