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:
Mar. 22, 2016
Filed:
Jun. 30, 2014
Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;
Takahiro Kawakami, Kanagawa, JP;
Shuhei Yoshitomi, Kanagawa, JP;
Teruaki Ochiai, Kanagawa, JP;
Yumiko Saito, Kanagawa, JP;
Yohei Momma, Kanagawa, JP;
Satoshi Seo, Kanagawa, JP;
Mayumi Mikami, Kanagawa, JP;
Shunsuke Adachi, Kanagawa, JP;
SEMIDONCONDUCTOR ENERGY LABORATORY CO., LTD., Kanagawa-ken, JP;
Abstract
The amount of lithium ions that can be received and released in and from a positive electrode active material is increased, and high capacity and high energy density of a secondary battery are achieved. Provided is a lithium-manganese composite oxide represented by LiMnMO, where M is a metal element other than Li and Mn, or Si or P, and y, z, and w satisfy 0≦x/(y+z)<2, y>0, z>0, 0.26≦(y+z)/w<0.5, and 0.2<z/y<1.2. The lithium manganese composite oxide has high structural stability and high capacity.