US 11,952,287 B2
Method for the precipitation of particles of a metal carbonate material without use of a chelating agent
Line Holten Kollin, Brønshøj (DK); Rainer Küngas, Copenhagen S (DK); Steen Henrik Olsen, Gentofte (DK); Anni Stahl, Lynge (DK); and Søren Dahl, Hillerød (DK)
Assigned to HALDOR TOPSØE A/S, Kgs. Lyngby (DK)
Appl. No. 16/317,981
Filed by HALDOR TOPSØE A/S, Kgs. Lyngby (DK)
PCT Filed Jul. 11, 2017, PCT No. PCT/EP2017/067360
§ 371(c)(1), (2) Date Jan. 15, 2019,
PCT Pub. No. WO2018/015207, PCT Pub. Date Jan. 25, 2018.
Claims priority of application No. PA 2016 00434 (DK), filed on Jul. 20, 2016.
Prior Publication US 2021/0300780 A1, Sep. 30, 2021
Int. Cl. C01G 53/06 (2006.01); B01J 19/18 (2006.01); C01G 53/00 (2006.01); H01M 4/02 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01)
CPC C01G 53/06 (2013.01) [B01J 19/1862 (2013.01); C01G 53/006 (2013.01); C01P 2002/72 (2013.01); C01P 2004/32 (2013.01); C01P 2004/50 (2013.01); C01P 2004/51 (2013.01); C01P 2004/61 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for the precipitation of particles of a metal carbonate material comprising nickel and manganese in an atomic ratio of 0≤Ni:Mn≤1:3, wherein an aqueous solution comprising sulfates of nickel and manganese or an aqueous solution comprising nitrates of nickel and manganese is mixed with an aqueous solution of sodium carbonate or potassium carbonate or a mixture of sodium carbonate and sodium hydroxide or a mixture of potassium carbonate and potassium hydroxide in a stirred reactor at pH>7.5 without the use of a chelating agent, thereby forming agglomerated particles in one precipitation step without any subsequent process steps to change the shapes of the agglomerated particles before use of the agglomerated particles as a precursor for the preparation of a lithium-ion battery positive electrode material, wherein the agglomerated particles are characterized by an average circularity higher than 0.90 and simultaneously an average aspect ratio lower than 1.50.