Method for the preparation of γLiV2O5
US7842273B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 18, 2005 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Apr 30, 2027 |
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 the preparation of an optionally carbonaceous γ-LiV2O5 material.The process consists in preparing a composition formed of carbon and of precursors of Li and of V and in subjecting it to a heat treatment. The composition is prepared by bringing carbon, α-V2O5 and a Li precursor into contact in amounts such that the ratio of the [V2O5]/[Li] concentrations is between 0.95 and 1.05 and the carbon is in excess of at least 25% with respect to the stoichiometry. The heat treatment is carried out in two stages: a first stage at a temperature between 90° C. and 150° C. for a time of 1 to 12 hours and a second stage at a temperature between 420° C. and 500° C. for a time of between 10 min and 1 hour, under a nitrogen or argon atmosphere or under vacuum.Applications: positive electrode active material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.