Method for producing lithium transition metallates

US6447739B1 · kind B1 · utility

Assignee

• H. C. Starck GmbH & Co. KG · DE

Inventors

• Ulrich Krynitz · Goslar, DE
• Wolfgang Kummer · Goslar, DE
• Mathias Benz · Goslar, DE
• Juliane Meese-Marktscheffel · Goslar, DE
• Evelyn Pross · Albbruck, DE
• Viktor Stoller · Bad Harzburg, DE

Key dates

• Filing date: Aug 19, 1999
• Grant date: Sep 10, 2002
• Expiry date: Aug 19, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The invention relates to a method for producing lithium transition metalates of the general formula (I): Lix(M1yM21−y)nOnz, where M1 represents lithium, cobalt or manganese; M2 represents cobalt, iron, manganese or aluminium and is not equal to M1; n is equal to 2 if M1=M, and 1 in all other cases; x is a number between 0.9 and 1.2; y is a number between 0.5 and 1.0; and z is a number between 1.9 and 2.1. According to the method, an intimate solid mixture is produced of oxygen-containing compounds of the transition metals and oxygen-containing lithium compounds and this mixture calcinated in a reactor, whereby calcination takes place at least partly at an absolute pressure of less than 0.5 bar.