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. 26, 2017
Filed:
May. 21, 2015
Ube Industries, Ltd., Ube-Shi, JP;
Hirofumi Takemoto, Ube, JP;
Yoshizumi Tanaka, Ube, JP;
Hiroshi Fujino, Ube, JP;
Yasumasa Iwamoto, Minato-ku, JP;
UBE INDUSTRIES, LTD., Ube-shi, JP;
Abstract
Provided is a lithium titanate powder for an electrode of an energy storage device, an active material containing the same, and an energy storage device using the active material. The lithium titanate powder comprises LiTiOas a main component, and wherein, when a volume surface diameter calculated from specific surface area determined by the BET method is Dand a crystallite diameter calculated from half-peak width of (111) plane of LiTiOby the Scherrer equation is D, Dis 0.1 to 0.6 μm; Dis larger than 80 nm; D/D(μm/μm), ratio of Dto D, is 3 or less; M (wherein M is at least one type of metal element selected from a group consisting of Mg, Zn, Al, Ga, and In) is contained; and when atomic concentrations of the M and titanium at 5 nm inner positions from a surface of a lithium titanate particle are D(atm %) and Dti (atm %) respectively, and when atomic concentration of the M at 100 nm inner position from the lithium titanate particle surface is D(atm %), following formulas (I) and (II) are satisfied.1/2≧5  (I)0.02≦1/≦0.4  (II)