A positive electrode active material for solid-state rechargeable batteries

Patent metadata

Field	Value
Publication number	US-2025054986-A1
Application number	US-202218720748-A
Country	US
Kind code	A1
Filing date	Dec 21, 2022
Priority date	Dec 22, 2021
Publication date	Feb 13, 2025
Grant date	—

Abstract

The present invention relates to a positive electrode active material for solid-state rechargeable batteries, comprising lithium, oxygen, nickel, and at least one metal selected from the group comprising manganese and cobalt, wherein characterized in that said positive electrode active material further comprises: —fluorine and has an atomic ratio of F to the total amount of Ni, Mn, and/or Co between 0.05 to 3.0, as determined by XPS analysis, and —carbon, wherein the carbon contents are from than 370 ppm to 5000 ppm, by the total weight of said positive electrode active material, as determined by a carbon analyzer.

First claim

1 - 18 . (canceled)

19 . A positive electrode active material for solid-state rechargeable batteries, comprising lithium, oxygen, nickel, and at least one metal selected from the group comprising manganese and cobalt, characterized in that said positive electrode active material further comprises:
fluorine and has an atomic ratio of F to the total amount of Ni, Mn, and/or Co between 0.05 to 3.0, as determined by XPS analysis, and carbon, wherein the carbon contents are from 370 ppm to 5000 ppm, by the total weight of said positive electrode active material, as determined by a carbon analyzer.

20 . The positive electrode active material according to claim 19 , wherein said positive electrode active material has an atomic ratio of F to the total amount of Ni, Mn, and/or Co between 0.1 to 2.5, as determined by XPS analysis.

21 . The positive electrode active material according to claim 19 , wherein the carbon contents are more than 500 ppm and less than 3000 ppm, as determined by a carbon analyzer.

22 . The positive electrode active material according to claim 19 , further comprising aluminum and having an atomic ratio of Al to the total amount of Ni, Mn, and/or Co between 0.2 to 4.0, as determined by XPS analysis.

23 . The positive electrode active material according to claim 19 , further comprising aluminum in an amount between 0.01 mol % and 2.0 mol %, relative to the total atomic content of Ni, Mn, Co in said material, as determined by ICP-OES.

24 . The positive electrode active material according to claim 19 , wherein an atomic content of nickel, relative to the total atomic content of Ni, Mn, Co in said material is from 55.0 to 95.0 mol %, as determined by ICP-OES.

25 . The positive electrode active material according to claim 19 , wherein an atomic content of cobalt, relative to the total atomic content of Ni, Mn, Co in said material is from 0 to 40.0 mol %, as determined by ICP-OES.

26 . The positive electrode active material according to claim 19 , wherein an atomic content of manganese, relative to the total atomic content of Ni, Mn, Co in said material is from 0 to 40.0 mol %, as determined by ICP-OES.

27 . The positive electrode active material according to claim 19 , wherein the positive electrode active material comprises single-crystalline particles.

28 . The positive electrode active material according to claim 27 , wherein the single-crystalline particles have a median particle size D50 A from 2.0 μm to 10.0 μm, as determined by laser diffraction particle size analysis.

29 . The positive electrode active material according to claim 19 , wherein the positive electrode active material comprises poly-crystalline particles.

30 . The positive electrode active material according to claim 29 , wherein the poly-crystalline particles have a median particle size D50 A from 2.0 μm to 10.0 μm, as determined by laser diffraction particle size analysis.

31 . A method for manufacturing a positive electrode active material, wherein said method comprises consecutive steps of:
mixing a lithium transition metal-based oxide compound and F-containing polymer, heating the mixture under an oxidizing atmosphere in a furnace at a temperature less than 350° C., for a time between 1 hour and 20 hours to obtain the positive electrode active material.

32 . The method according to claim 31 , wherein the F-containing polymer is polyvinylidene fluoride (PVDF) or polytetrafluoroethylene (PTFE).

33 . The method according to claim 31 , wherein the heating temperature is between 200° C. and 350° C.

34 . The method according to claim 31 , wherein the positive electrode active material is according to claim 19 .

35 . A solid-state battery comprising the positive electrode material according to claim 19 .

36 . A portable computer, a tablet, a mobile phone, energy storage system, electric vehicle, or a hybrid electric vehicle comprising the solid-state rechargeable battery according to claim 35 .

Assignees

• Umicore Nv

Inventors

• Kumakura Shinichi
• Kang Jihoon
• Auvergniot Jérémie
• Park Gyeongseo

Classifications

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M4/525 Primary

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• H01M2300/0082

  Organic polymers · CPC title

• H01M2004/028

  Positive electrodes · CPC title