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:
Apr. 15, 1997
Filed:
Aug. 03, 1995
Kensuke Tahara, Chiba, JP;
Fumiharu Iwasaki, Chiba, JP;
Seiji Yahagi, Chiba, JP;
Akifumi Sakata, Chiba, JP;
Tsugio Sakai, Chiba, JP;
Hideki Ishikawa, Chiba, JP;
Shinichi Takasugi, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A non-aqueous electrolyte secondary battery comprises a negative electrode having an active material comprised of lithium or a material capable of absorbing and releasing lithium, a lithium ion conductive non-aqueous electrolyte, and a positive electrode. The positive electrode active material is comprised of a composite represented by composition formula Li.sub.a R.sub.b L.sub.c M.sub.d O.sub.2 where R is one or more metalloid elements selected from boron B and silicon Si, L is at least one element selected from metals and metalloids of Groups IIIA and IVA of the periodic table, alkaline earth metals, and metals selected from the group consisting of Ti, Mn, Cu and Zn, M represents transition metal elements comprising at least Ni and Co, R, L and M are different, and a, b, c and d satisfy 0<a.ltoreq.1.15, 0.85.ltoreq.b+c+d.ltoreq.1.3, 0<b+c.ltoreq.0.5, 0<b and 0.ltoreq.c.