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:
Mar. 24, 2009
Filed:
Mar. 26, 2004
Eri Kojima, Ibaraki, JP;
Hiromu Sugiyama, Suita, JP;
Atsushi Ueda, Hirakata, JP;
Shigeo Aoyama, Otsu, JP;
Eri Kojima, Ibaraki, JP;
Hiromu Sugiyama, Suita, JP;
Atsushi Ueda, Hirakata, JP;
Shigeo Aoyama, Otsu, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Abstract
A negative electrode of the present invention has an active material layer composed of an intermetallic compound on a collector. The intermetallic compound is capable of occluding/desorbing lithium and contains at least one kind of element A selected from Sn, In, Ge, Ga, Pb, Al, Sb, and Si, and an element X that does not substantially react with Li. In the negative electrode, a ratio I/Iof highest peak intensities Iand Iof X-ray diffraction peaks derived from the intermetallic compound and the element A is 0.1 or less. By configuring a non-aqueous secondary battery using the above-mentioned negative electrode, the charging/discharging efficiency and cycle characteristics of a thin film electrode used for the negative electrode of the non-aqueous secondary battery are enhanced.