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:
Dec. 09, 2008
Filed:
Feb. 05, 2004
Hideyasu Takatsuji, Moriguchi, JP;
Masaya Okochi, Osaka, JP;
Yosuke Kita, Osaka, JP;
Ryoichi Tanaka, Izumiotsu, JP;
Shoichiro Watanabe, Nara, JP;
Hideyasu Takatsuji, Moriguchi, JP;
Masaya Okochi, Osaka, JP;
Yosuke Kita, Osaka, JP;
Ryoichi Tanaka, Izumiotsu, JP;
Shoichiro Watanabe, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A positive electrode active material for a lithium ion secondary battery is a lithium-containing composite oxide represented by the chemical formula: Li(CoMgAl)MO, where M is at least one element selected from the group consisting of Na and K, and the values a, b, c, x, y and z respectively satisfy 0≦a≦1.05, 0.005≦x≦0.15, 0.0001≦y≦0.01, 0.0002≦z≦0.008, 0.85≦b≦1.1 and 1.8≦c≦2.1. This makes it possible to improve a high temperature storage characteristics and safety of the lithium ion secondary battery.