Modified lithium nickel oxide compounds for electrochemical cathodes and cells
US5750288A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1995 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Oct 3, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.