Cathode material, method of preparing it and nonaqueous solvent type secondary battery having a cathode comprising it
US5679481A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1995 |
| Grant date | Oct 21, 1997 |
| Priority date | — |
| Expiry date | Nov 9, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cathode material for a lithium ion secondary battery comprises a compound of the formula EQU Li.sub.1-X-a A.sub.X Ni.sub.1-Y-b B.sub.Y O.sub.2. wherein: A is an alkaline earth metal component selected from the group consisting of (1) at least two of magnesium, calcium, strontium and barium, (2) strontium alone and (3) barium alone; B is at least one transition metal element other than Ni; X is the total number of moles of A and if A consists of more than one alkaline earth metal element, then X is the total number of moles of all alkaline earth metal elements; Y is the total number of moles of B and if B consists of more than one transition metal element, then Y is the total number of moles of all transition metal elements; and X, Y, a and b satisfy the respective equations: EQU 0<X.ltoreq.0.10 EQU 0<Y.ltoreq.0.30 EQU -0.10.ltoreq.a.ltoreq.0.10 EQU -0.15.ltoreq.b.ltoreq.0.15.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.