Non-homogenous positive electrode materials combining high safety and high power in a Li rechargeable battery
US8673170B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2010 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | May 19, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a LiaNixCoyMzO2±eAf composite oxide for use as a cathode material in a rechargeable battery, with a non-homogenous Ni/Al ratio in the particles, allowing excellent power and safety properties when used as positive electrode material in Li battery. More particularly, in the formula 0.9<a<1.1, 0.3≦x≦0.9, 0≦y≦0.4, 0<z≦0.35, e=0, 0≦f≦0.05 and 0.9<(x+y+z+f)<1.1; M consists of either one or more elements from the group Al, Mg and Ti; A consists of either one or more elements from the group S and C. The powder has a particle size distribution defining a D10, D50 and D90; and said x and z parameters varying with the particles size of said powder, and is characterized in that either one or both of: x1−x2≧0.010 and z2−z1≧0.010; x1 and z1 being the parameters corresponding to particles having a particle size D90; and x2 and z2 being the parameters corresponding to particles having a particle size D10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.