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:
Jun. 25, 2002
Filed:
Sep. 11, 2000
Takayuki Shirane, Osaka, JP;
Yoshiaki Nitta, Osaka, JP;
Shuji Tsutsumi, Osaka, JP;
Masaki Hasegawa, Osaka, JP;
Junichi Yamaura, Hyogo, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A non-aqueous electrolyte secondary battery using lithium containing composite oxide, which intercalates and de-intercalates lithium, for a positive electrode; and lithium containing composite nitride and a compound having a large irreversible capacity for a negative electrode. Metal oxide is used as a material for the negative electrode, and lithium containing composite nitride represented by the general formula of Li M N (M is a transition metal, 0.2<x≦0.8) is also contained in the negative electrode. Lithium containing composite nitride containing cobalt as its transition metal M is further preferable because it has high capacity and good reversibility. For the positive electrode of the secondary battery, lithium containing composite oxide such as lithium cobaltate, lithium nickelate, their composite compound, and lithium manganate (LiMn O ) may be used. High capacity and high quality non-aqueous electrolyte secondary battery with good cycle reversibility may be obtained by adding lithium containing composite nitride to the negative electrode.