VERFAHREN ZUR HERSTELLUNG VON LITHIUM-ÜBERGANGSMETALLATEN

摘要

The invention relates to a method for producing lithium-transition metal mixtures of general formula Lix(M<1>yM<2>1-y)nOnz, wherein M<1 >represents nickel, cobalt or manganese, M<2 >represents chromium, cobalt, iron, manganese, molybdenum or aluminium, and is different from M<1>, n is 2 if M<1 >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 M<1 >compound is used in powder form having a specific surface of at least 20 m<2>/g (BET) and calcination is carried out in a fluidised bed.