Patent ID: 10468678

Abstract:
Process for making a particulate material of general formula (I), wherein the integers are defined as follows: M is selected from Al and Ti, x is in the range of from 0.015 to 0.03, a is in the range of from 0.3 to 0.6, b is in the range of from 0.05 to 0.35, c is in the range of from 0.2 to 0.5, d is in the range of from 0.001 to 0.03, with a+b+c+d=1 said process comprising the following steps: (a) co-precipitating a mixed hydroxide of nickel, cobalt and manganese from a solution of water-soluble salts of nickel, cobalt and manganese by contacting such solution with a solution of alkali metal hydroxide, (b) adding an aqueous solution of an aluminate or titanate and thereby co-precipitating a layer of a mixed hydroxide of nickel and cobalt and manganese and aluminum or titanium on the particles formed in step (a), (c) removing particles of (Nia Cob Mnc Ald)(OH)2+d or (Nia Cob Mnc Tid)(OH)2+2d so obtained and drying them in the presence of oxygen, (d) mixing the particles obtained in step (c) with at least one Li compound selected from Li2O, LiOH and Li2CO3, (e) calcining the mixture obtained according to step (d) at a temperature in the range of from 920 to 950° C.