Positive electrode active material and method for manufacturing a positive electrode active material

Patent metadata

Field	Value
Publication number	US-2025364548-A1
Application number	US-202318873800-A
Country	US
Kind code	A1
Filing date	Jun 12, 2023
Priority date	Jun 13, 2022
Publication date	Nov 27, 2025
Grant date	—

Abstract

Positive electrode active material, wherein the metal has a composition M, which consists of Ni in a content x, Mn in a content y, Co in a content z, and A in a content a. A is at least one chemical element other than Li, Ni, Mn, Co, and O. x, y, z, and a are expressed as molar contents and x+y+z+a=100%. Further, x≥70.0%, 0≤y≤30.0%, 0≤z≤30.0%, 0≤a≤5.0%, and an X-Ray diffractogram from Cu K-α X-ray radiation source of the positive electrode active material has a (003) peak at 2θ=17.0° to 20.0° and (104) peak at 2θ=43.0° to 46.0°. The ratio (maximum intensity of the (003) peak)/(maximum intensity of the (104) peak) is at least 1.880.

First claim

1 - 13 . (canceled)

14 . A positive electrode active material comprising lithium and a metal other than lithium and oxygen, wherein the metal has a composition M, wherein M consists of Ni in a content x, Mn in a content y, Co in a content z, and A in a content a, wherein A is at least one chemical element other than Li, Ni, Mn, Co, and O, wherein x, y, z, and a are expressed as molar contents, wherein x+y+z+a=100 mol %,
wherein x≥70.0 mol %, wherein 0<y≤30.0 mol %, wherein 0<z≤30.0 mol %, wherein 0≤a≤5.0 mol %, wherein an X-Ray diffractogram obtained from Cu K-α X-ray radiation source of the positive electrode active material has a (003) peak located at 2θ from 17.0° to 20.0° and (104) peak located at 2θ from 43.0° to 46.0°, wherein a ratio (maximum intensity of the (003) peak)/(maximum intensity of the (104) peak) is at least 1.880, and wherein the positive electrode active material is monolithic.

15 . The positive electrode active material according to claim 14 , wherein the ratio (maximum intensity of the (003) peak)/(maximum intensity of the (104) peak) is at least 1.900.

16 . The positive electrode active material according to claim 14 , wherein the ratio (maximum intensity of the (003) peak)/(maximum intensity of the (104) peak) is at least 1.920.

17 . The positive electrode active material according to claim 14 , wherein a molar ratio: Li/(other metal elements than Li) in the first positive electrode active material is at least 0.90 and at most 1.10.

18 . The positive electrode active material according to claim 14 , wherein x>80.0mol %.

19 . The positive electrode active material according to claim 14 , wherein x<98.5mol %.

20 . The positive electrode active material according to claim 14 , wherein (y+z)>1.0 mol %.

21 . The positive electrode active material according to claim 14 , wherein y>0.5 mol % and wherein z>0.5 mol %.

22 . The positive electrode active material according to claim 14 , wherein the positive electrode active material comprises LiOH in a content of at most 0.20 wt. % relative to the total weight of positive electrode active material, wherein the content of LiOH is measured by acid-base titration.

23 . A method for manufacturing a positive electrode active material according to claim 14 , comprising the consecutive steps of:
a. heating a precursor material at a heating temperature T1 between 750° C. and 1000° C., for a time period t1 between 2 and 20 hours to obtain a heated product, b. cooling the heated product to a second temperature T2 to obtain a first cooled product, c. further cooling the first cooled product to obtain a second cooled product, d. milling the second cooled product to obtain a milled product, e. heating the milled product at a temperature T3 between 200° C. and 900° C. to obtain the positive electrode active material, wherein step b is cooling the heated product to a second temperature T2 between 600° C. and 800° C. to obtain a second heated product, wherein the average cooling rate is between 10° C./h and 50° C./h, or wherein step b is cooling the heated product to a second temperature T2 between 650° C. and 900° C. and keeping the temperature T2 for a time t2 between 5 and 20 hours.

24 . The method according to claim 23 , wherein ΔT=(T1−T2), wherein 20° C.≤ΔT≤400° C.

25 . The method according to claim 23 , wherein 300° C.≤T3≤800° C.

26 . The method according to claim 23 , wherein the milling is a wet milling in a milling solution.

Assignees

• Umicore Nv

Inventors

• Hyoung Jooeun
• Blangero Maxime
• Yong Hansol
• Crivits Tijl

Classifications

• C01P2006/40

  Electric properties · CPC title

• C01P2004/03

  obtained by SEM · CPC title

• C01P2002/74

  by peak-intensities or a ratio thereof only · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2002/50

  Solid solutions · CPC title