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:
Aug. 03, 2004
Filed:
Apr. 10, 2002
Applicant:
Inventors:
Shuji Tsutsumi, Katano, JP;
Masaki Hasegawa, Hirakata, JP;
Shinji Kasamatsu, Katano, JP;
Yoshiaki Nitta, Hirakata, JP;
Miho Kayama, Hirakata, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/58 ; C01D 1/500 ; C01B 2/100 ;
U.S. Cl.
CPC ...
H01M 4/58 ; C01D 1/500 ; C01B 2/100 ;
Abstract
A lithium-containing composite nitride with an alkaline metal or an alkaline earth metal added thereto is used as the negative electrode active material, or used as surface layers of core particles of a lithium-containing composite nitride, to provide a negative electrode material for a nonaqueous electrolyte secondary battery with large capacity and high reliability improved in oxidation and decomposition resistance property and thus capacity recovery property after overdischarge.