Method for producing lithium-transition metal mixtures

US6875416B1 · kind B1 · utility

Assignee

• H.C. STARCK INC. · US

Inventors

• Mathias Benz · Goslar, DE
• Wolfgang Kummer · Goslar, DE
• Evelyn Pross · Albbruck, DE
• Josef Schmoll · Wermelskirchen, DE
• Wolfgang Schweda · Kempen, DE
• Daniel Gordon Duff · Leverkusen, DE
• Ricarda Leiberich · Langen, DE
• Christoph Schild · Leverkusen, DE
• Ulrich Krynitz · Goslar, DE
• Juliane Meese-Marktscheffel · Goslar, DE
• Viktor Stoller · Bad Harzburg, DE

Key dates

• Filing date: Aug 13, 1998
• Grant date: Apr 5, 2005
• Expiry date: Aug 13, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing lithium-transition metal mixtures of general formula Lix(M1yM21-y)nOnz, wherein M1 represents nickel, cobalt or manganese, M2 represents chromium, cobalt, iron, manganese, molybdenum or aluminium, and is different from M1, n is 2 if M1 represents manganese and is 1 otherwise, x is comprised between 0.9 and 1.2, y is comprised between 0.5 and 1.0 and z is comprised between 1.9 and 2.1. According to the inventive method, an intimate mixture composed of transition metal compounds containing oxygen and of a lithium compound containing oxygen is calcinated, said mixture being obtained by processing a solid powder transition metal compound with a solution of said lithium compound, and then drying. At least the M1 compound is used in powder form having a specific surface of at least 20 m2/g (BET) and calcination is carried out in a fluidised bed.