Insertion compound able to be used as cathodic active material of a lithium rechargeable electrochemical cell
US7799459B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | May 24, 2007 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Jun 18, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A compound for use as active material of a positive electrode of a lithium-ion cell. This compound has an average discharge voltage above 4.5V in relation to the Li+/Li couple of approximately 4.7V. The compound includes: a) a spinel-type crystalline phase of formula LiaNiII0.5−xMnIII2xMnIV1.5−x−yMyO4 in which elements Ti and Al, or a mixture of these; 0.8<a<1.3; 0<x≦0.15; 0<y≦0.15; b) a cubic crystalline phase of formula Li1−tNi1+tO in which 0≦t≦1; and c) a rhomboedric crystalline phase of formula Li1−ZNi1+zO2 in which 0≦z≦1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.