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. 29, 2013
Filed:
Dec. 11, 2009
Kiyoshi Nakahara, Ube, JP;
Toshimasa Seki, Ube, JP;
Nobuyuki Hashimoto, Ube, JP;
Titan Kogyo Kabushiki Kaisha, Ube-Shi, Yamaguchi-Ken, JP;
Abstract
For the purpose of increasing the electric capacity of lithium secondary batteries comprising titanium-based negative electrode materials, the present invention aims to produce a titanium oxide compound whose crystal structure, crystallite size, specific surface area and primary particle size are controlled, and to provide a lithium secondary battery comprising such a compound. The present invention produces a lithium secondary battery by using, as an electrode active material, a titanium oxide compound for use in an electrode, which is represented by TiO.(HO)a.(AO)b (wherein A is Na or K, a is 0<a=1, and b is 0<b=0.1) and has a main peak at 2θ=20° to 30° and a minor peak at 2θ=45° to 55° in its X-ray diffraction pattern, wherein the crystallite size determined from the main peak ranges from 40 Å more to 500 Å or less.