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. 24, 2016
Filed:
Dec. 18, 2014
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Koji Ohira, Osaka, JP;
Motoaki Nishijima, Osaka, JP;
Toshitsugu Sueki, Osaka, JP;
Shogo Esaki, Osaka, JP;
Isao Tanaka, Kyoto, JP;
Yukinori Koyama, Kyoto, JP;
Katsuhisa Tanaka, Kyoto, JP;
Koji Fujita, Kyoto, JP;
Shunsuke Murai, Kyoto, JP;
SHARP KABUSHIKI KAISHA, Osaka, JP;
Abstract
A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below,LiFeMPSiO  (1), where: an average valence of Fe is +2 or more; M is an element having a valence of +2 or more and is at least one type of element selected from the group consisting of Zr, Sn, Y, and Al; the valence of M is different from the average valence of Fe; 0<x≦0.5; and y=x×({valence of M}−2)+(1−x)×({average valence of Fe}−2). This provides a cathode active material that not only excels in terms of safety and cost but also can provide a long-life battery.