Process for preparation of a lithiated or overlithiated transition metal oxide, active positive electrode materials containing this oxide, and a battery

US6652605B1 · kind B1 · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Carole Bourbon · Saint-Michel-de-Saint-Geoirs, FR
• Frederic Le Cras · L'Isle-d'Abeau, FR
• Franck Rouppert · Voiron, FR
• Didier Bloch · Biviers, FR

Key dates

• Filing date: Dec 7, 1999
• Grant date: Nov 25, 2003
• Expiry date: Dec 7, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49108
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

This invention relates to a process for manufacturing a lithiated or overlithiated transition metal oxide comprising the following three steps, carried out successively or in a simultaneous manner:preparation of a solution of lithium alkoxide by dissolving lithium metal in an alcohol, the said alcohol being chosen among the alcohols originating from linear or ramified alkanes comprising at least three carbon atoms, the alcohols originating from unsaturated aliphatic hydrocarbides, and mixtures of them;addition of a transition metal oxide powder to the said lithium alkoxide solution to obtain a dispersion;controlled reduction of the said transition metal oxide by the said alkoxide to obtain a lithiated or overlithiated transition metal oxide with a defined Li:Metal stoichiometry;the said process also comprising the following steps:evaporation of the residual alcohol,rinsing of the powder thus obtained,drying of the powder.