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:
Feb. 14, 2012
Filed:
Apr. 14, 2008
Yoshio Kajiya, Kitaibaraki, JP;
Hirohito Sato, Kitaibaraki, JP;
Ryuichi Nagase, Kitaibaraki, JP;
JX Nippon Mining & Metals Corporation, Tokyo, JP;
Abstract
A lithium-manganese composite oxide for a lithium ion battery having a good cycle property at high-temperature and battery property of high capacity is provided. A spinel type lithium-manganese composite oxide for a lithium ion battery represented by a general formula: LiMnMO(wherein M is one or more elements selected from Al, Mg, Si, Ca, Ti, Cu, Ba, W and Pb, and, −0.1≦x≦0.2, and 0.06≦y≦0.3), and when D10, D50 and D90 are defined as a particle size at which point the cumulative frequency of volume reaches 10%, 50% and 90% respectively, d10 is not less than 2 μm and not more than 5 μM, d50 is not less than 6 μm and not more than 9 μm, and d90 is not less than 12 μm and not more than 15 μM, and BET specific surface area thereof is greater than 1.0 m/g and not more than 2.0 m/g, and the tap density thereof is not less than 0.5 g/cmand less than 1.0 g/cm.