Basf Se Corporation

Ji-Yong Shin

Simon Schroedle

Jordan K Lampert

Aleksei Volkov

Thomas Michael Ryll

Markus Hoelzle

Michael Eder

Process for making a particulate material of general formula (I),Li(NiCoMnM)O&#x2003;&#x2003;(I)

Process for making cathode materials for lithium ion batteries

The present invention is directed towards a process for making a particulate material according to the general formula (I): NiCOMnM(O)(OH), wherein M is selected from Al and Ti, x is in the range of from 0.01 to 0.9, y is in the range of from 1.1 to 1.99, a is in the range of from 0.3 to 0.85, b is in the range of from 0.05 to 0.4, c is in the range of from 0.1 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) providing an aqueous slurry of particles of aluminum hydroxide or titanium dioxide, (b) adding an aqueous solution of water-soluble salts of nickel, cobalt and manganese and a solution of alkali metal hydroxide to the slurry according to step (a), thereby co-precipitating a layer of a mixed hydroxide of nickel and cobalt and manganese hydroxide on the particles according to step (a), (c) removing particles of (NiCOMnAl)(OH)or (NiCOMnTi)(OH)so obtained and drying them in the presence of oxygen.

Process for making a cathode active material and a precursor therefore, cathode active material and its use

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 (NiCoMnAl)(OH)or (NiCoMnTi)(OH)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 LiO, LiOH and LiCO, (e) calcining the mixture obtained according to step (d) at a temperature in the range of from 920 to 950&#xb0; C.

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Mannheim, Germany

Ji-Yong Shin