Lithium secondary battery
US6333128A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1999 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | Mar 19, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides a positive electrode active material for a lithium secondary battery including a composite oxide powder having a median diameter of 3.0 through 20.0 .mu.m and a content of particles with a grain size of 1 .mu.m or less of 10% by volume or less and being represented by a composition formula, Li.sub.a Co.sub.b M.sub.c Ni.sub.1-b-c O.sub.2, in which M is at least one element selected from the group consisting of B, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Cu, Zn, Ga, Ge, Y, Nb, Mo, Ru, Rh, Pd, Ag, Cd, In and Sn; 0.ltoreq.a.ltoreq.1.2; 0.01.ltoreq.b.ltoreq.0.4; 0.01.ltoreq.c.ltoreq.0.4; and 0.02.ltoreq.b+c.ltoreq.0.5. Thus, the lithium secondary battery can be improved in its charge-discharge cycle characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.