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:
Jan. 12, 2010
Filed:
Feb. 20, 2004
Katsuya Kase, Nihama, JP;
Hirofumi Iisaka, Toyota, JP;
Satoru Suzuki, Kariya, JP;
Manabu Yamada, Kariya, JP;
Katsuya Kase, Nihama, JP;
Hirofumi Iisaka, Toyota, JP;
Satoru Suzuki, Kariya, JP;
Manabu Yamada, Kariya, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Denso Corporation, Kariya-shi, Aichi-ken, JP;
Abstract
An active material for positive electrode for a non-aqueous electrolyte secondary battery comprises a lithium-metal composite oxide that is expressed by the general formula of Li(NiCo)MO(where 0.98≦x≦1.10, 0.05≦y≦0.4, 0.01≦z≦0.2, and where M is at least one metal element selected from the group of Al, Mg, Mn, Ti, Fe, Cu, Zn and Ga), and where the SOion content is in the range from 0.4 weight % to 2.5 weight %, and the occupancy rate of lithium found from the X-ray diffraction chart and using Rietveld analysis is 98% or greater, and the carbon amount measured by way of the high frequency heating-infrared adsorption method is 0.12 weight % or less, and that the Karl Fischer water content due to heating at 180° C. be 0.2 weight % or less.