Nano-sized structured layered positive electrode materials to enable high energy density and high rate capability lithium batteries
US8277683B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2009 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Sep 7, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Nano-sized structured dense and spherical layered positive active materials provide high energy density and high rate capability electrodes in lithium-ion batteries. Such materials are spherical second particles made from agglomerated primary particles that are Li1+α(NixCoyMnz)1−tMtO2−dRd, where M is selected from can be Al, Mg, Fe, Cu, Zn, Cr, Ag, Ca, Na, K, In, Ga, Ge, V, Mo, Nb, Si, Ti, Zr, or a mixture of any two or more thereof, R is selected from F, Cl, Br, I, H, S, N, or a mixture of any two or more thereof, and 0≦α≦0.50; 0<x≦1; 0≦y≦1; 0<z≦1; 0≦t≦1; and 0≦d≦0.5. Methods of preparing such materials and their use in electrochemical devices are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.