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. 14, 2009
Filed:
Dec. 23, 2004
Toyotaka Yuasa, Hitachi, JP;
Masahiro Kasai, Mito, JP;
Toyotaka Yuasa, Hitachi, JP;
Masahiro Kasai, Mito, JP;
Shin-Kobe Electric Machinery Co., Ltd., Tokyo, JP;
Abstract
A positive electrode material for a nonaqueous lithium secondary battery and a lithium secondary battery that has superior cycle life and safety and reduced internal resistance of the battery at low temperature is provided. The positive electrode material for a nonaqueous lithium secondary battery comprise a layered structured complex oxide expressed by a composition formula LiMnNiCoMO, where 0<a≦1.2, 0.1≦x≦0.9, 0≦y≦0.44, 0.1≦z≦0.6, 0.01≦α≦0.1, and x+y+z+α=1. A diffraction peak intensity ratio between the (003) plane and the (104) plane (I(003)/I(104)) in an X-ray powder diffractometry using a Cu—Kα line in the X-ray source is not less than 1.0 and not more than 1.5.