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:
May. 12, 1998
Filed:
Oct. 03, 1995
Like Xie, Madison, WI (US);
David T Fouchard, Madison, WI (US);
Walter B Ebner, Gastonia, NC (US);
El-Sayed Megahed, Madison, WI (US);
Rayovac Corporation, Madison, WI (US);
Abstract
The present invention relates to electrochemical cells, and more particularly to secondary lithium intercalation cells. Nickel is employed as a component 'M' in an active cathode material represented by the formula Li.sub.x M.sub.y O.sub.z, where 'x' and 'y' are generally about 1, and 'z' is generally about 2. In the present invention 'M.sub.y ' is divided into two components, a first major component of nickel, corresponding to at least 70% of 'M.sub.y,' and a second minor component comprising at least one of a non-transition metal selected from the group consisting of aluminum, gallium, tin, and zinc, and in some embodiments at least one transition metal selected from the group consisting of scandium and the Period 5 metals having atomic numbers between 39 and 42. A two-stage reaction process for making the compounds of the active cathode materials of the present invention is described.