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:
Oct. 20, 2009
Filed:
Mar. 22, 2007
Syuuhei Oda, Ehime-ken, JP;
Ryuichi Kuzuo, Ehime-ken, JP;
Tomoyoshi Ueki, Aichi-ken, JP;
Satoru Suzuki, Aichi-ken, JP;
Manabu Yamada, Aichi-ken, JP;
Syuuhei Oda, Ehime-ken, JP;
Ryuichi Kuzuo, Ehime-ken, JP;
Tomoyoshi Ueki, Aichi-ken, JP;
Satoru Suzuki, Aichi-ken, JP;
Manabu Yamada, Aichi-ken, JP;
Sumito Metal Mining Co., Ltd., Tokyo, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-Ken, JP;
Denso Corporation, Aichi-Ken, JP;
Abstract
To provide a positive electrode active material for a non-aqueous electrolyte secondary battery, which if used as a positive electrode for a lithium ion secondary battery, the battery internal resistance can be reduced, giving a secondary battery superior in output characteristics and life property. After mixing raw material powders in specified quantities of each so as to become a lithium-metal complex oxide represented by LiNiMO(wherein M is at least one kind or more of metal elements selected from the group consisting of Co, Al, Mg, Mn, Ti, Fe, Cu, Zn, and Ga; and w and z respectively satisfy 0<w≦0.25, and 1.0≦z≦1.1), baking is performed in two stages. At first the temperature is raised from room temperature to a first stage baking temperature (450 to 550° C.) at a temperature rise rate of 0.5 and 15° C./min, and held for 1 to 10 hours. Then the temperature is raised to a second stage baking temperature (650 to 800° C.), and held for 0.6 to 30 hours.