Introduction of titanium homogeneously into a solid material

Patent metadata

Field	Value
Publication number	US-2021024370-A1
Application number	US-201816640772-A
Country	US
Kind code	A1
Filing date	Aug 15, 2018
Priority date	Aug 23, 2017
Publication date	Jan 28, 2021
Grant date	—

Abstract

The invention relates to a method for the precipitation of a solid material, where the method comprises: providing an aqueous metal ion solution, said metal ion solution comprising TiOSO4 and metal ions of a metal M, where M is one or more of the elements: Mg, Co, Cu, Ni, Mn, Fe; providing an aqueous carbonate solution; and mixing said aqueous metal ion solution and said aqueous carbonate solution thereby providing a solid material comprising titanium and a metal carbonate comprising said metal(s) M, where the titanium is homogeneously distributed within the solid material. The invention also relates to a solid material, a method of preparing a positive electrode material for a secondary battery from the solid material and the use of the solid material as a precursor for the preparation of a positive electrode material for a secondary battery.

First claim

1 . A method for the precipitation of a solid material, said method comprising:
providing an aqueous metal ion solution, said metal ion solution comprising TiOSO 4 and metal ions of a metal M, where M is one or more of the elements: Mg, Co, Cu, Ni, Mn, Fe; providing an aqueous carbonate solution; and mixing said aqueous metal ion solution and said aqueous carbonate solution thereby providing a solid material comprising titanium and a metal carbonate comprising said metal(s) M, where the titanium is homogeneously distributed within the solid material.

2 . A method according to claim 1 , where said metal ion solution comprises Mg 2+ ions and metal ions of a metal M′, where M′ is one or more of the elements: Co, Cu, Ni, Mn, Fe.

3 . A method according to claim 1 , where M contains Ni, Mn and Mg.

4 . A method according to claim 1 , where the metal ion solution is prepared from sulfate(s), nitrate(s) or acetate(s).

5 . A method according to claim 1 , wherein the method is carried out without the use of a chelating agent.

6 . A method according to claim 1 , wherein the solid material is precipitated and agglomerated into agglomerated particles, wherein D50 of said agglomerated particles is between 1 and 50 μm.

7 . A method according to claim 6 , wherein the agglomerated particles are essentially spherical.

8 . A method according to claim 6 , wherein the agglomerated particles are characterized by an average circularity higher than 0.90 and simultaneously an average aspect ratio lower than 1.50.

9 . A method according to claim 1 , wherein the pH value of the mixed aqueous metal ion solution and aqueous carbonate solution is 7.5<pH<10.0.

10 . A method according to claim 1 , further comprising the step of:
providing a NaOH solution and mixing the NaOH solution with the aqueous metal ion solution and the aqueous carbonate solution.

11 . A solid material prepared by the method according to claim 1 , where said solid material comprises titanium as well as a metal carbonate comprising said metal(s), where M is one or more of the elements: Mg, Co, Cu, Ni, Mn, Fe, and where titanium is homogeneously distributed within said solid material.

12 . A solid material according to claim 11 , wherein the solid material has an overall composition such that the atomic ratio Ti:M between titanium and said metal(s) M is 0<Ti:M≤0.2.

13 . A solid material according to claim 11 , where said solid material comprises Mg and a metal M′, where M′ is one or more of the elements: Co, Cu, Ni, Mn, Fe.

14 . A solid material according to claim 11 , where M contains Ni, Mn and Mg.

15 . A solid material according to claim 11 , where Ti is present in the solid material as an oxide, a hydroxide, a carbonate or mixtures thereof.

16 . A solid material according to claim 11 , wherein the solid material after precipitation has been agglomerated into particles, wherein D50 of said agglomerated particles is between 1 and 50 μm.

17 . A method of preparing a positive electrode material for a secondary battery from the solid material of claim 12 , comprising the steps of:
mixing the solid material comprising titanium as well as a metal carbonate with a starting material comprising Li or Na, sintering the solid material and the starting material, thereby partly or fully decomposing said solid material and said starting material comprising Li or Na.

18 . A precursor for the preparation of positive electrode material for a secondary battery comprising the solid material of claim 12 , after lithiation or sodiation of the solid material.

Assignees

• Haldor Topsoe As

Inventors

• Dahl Søren
• Fold Von Bülow Jon
• Küngas Rainer
• Stahl Anni
• Axmann Peter
• Arnold Gisela
• Pfeifer Claudia
• Weirather Wolfgang

Classifications

• C01G53/82

  Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• C01P2004/32

  Spheres · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C01G53/04 Primary

  Oxides · CPC title