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. 11, 2007
Filed:
Dec. 23, 2003
Manabu Suhara, Kanagawa, JP;
Kazuo Sunahara, Kanagawa, JP;
Naoshi Saitoh, Kanagawa, JP;
Tsutomu Katoh, Kanagawa, JP;
Manabu Suhara, Kanagawa, JP;
Kazuo Sunahara, Kanagawa, JP;
Naoshi Saitoh, Kanagawa, JP;
Tsutomu Katoh, Kanagawa, JP;
Seimi Chemical Co., Ltd., Chigasaki, JP;
Abstract
A composite oxide suitable for an active material of a positive electrode for a lithium secondary cell which can be used in a wide range of voltage, has a large electric capacity and excellent low temperature performance and is excellent in the durability for charge-discharge cycles and highly safe, a process for its production, and a positive electrode and a cell employing it, are presented. The composite oxide is a lithium-cobalt composite oxide which is represented by the formula LiCoMO, (wherein 0≦x≦0.02 and M is at least one member selected from the group consisting of Ta, Ti, Nb, Zr and Hf), and which has a half-width of the diffraction peak for (110) face at 2θ=66.5±1°, of from 0.070 to 0.180°, as measured by the X-ray diffraction using CuKas a ray source.