A positive electrode active material for rechargeable solid-state batteries

Patent metadata

Field	Value
Publication number	US-2025046807-A1
Application number	US-202218718184-A
Country	US
Kind code	A1
Filing date	Dec 15, 2022
Priority date	Dec 16, 2021
Publication date	Feb 6, 2025
Grant date	—

Abstract

A positive electrode active material can be used for a solid-state rechargeable battery. The positive electrode active material comprises Li, M′, and oxygen. M′ comprises Ni in a content x, Co in a content y, Mn in a content z, an element other than Li, O, Ni, Co, Mn, Al, B, and W in a content a, B in a content b, Al in a content c, and W in a content d, wherein 50.0≤x≤95.0 mol %, 0≤y≤40.0 mol %, 0≤z≤70.0 mol %, 0≤a≤2.0 mol %, 0.01≤b≤1.6 mol %, 0.00≤c≤1.5 mol %, and 0.00≤d≤1.5 mol %, all relative to M′. The positive electrode active material has a B content B A defined as

b

(

x
+
y
+
z
+
b
+
c
+
d

)

,

and a content B B . B B is expressed as molar fraction compared to the sum of molar fractions of Ni, Mn, Co, B, Al, and W, as measured by XPS analysis, wherein the ratio B B /B A >10.0.

First claim

1 - 24 . (canceled)

25 . A positive electrode active material configured for use in a solid-state rechargeable battery, wherein the positive electrode active material comprises Li, M′, and oxygen, wherein M′ comprises:
Ni in a content x, wherein 50.0≤x≤95.0 mol %, relative to M′,
Co in a content y, wherein 0≤y≤40.0 mol %, relative to M′,
Mn in a content z, wherein 0≤z≤70.0 mol %, relative to M′,
an element other than Li, O, Ni, Co, Mn, Al, B, and W in a content a, wherein 0≤a≤2.0 mol %, relative to M′, and,
B in a content b, wherein 0.01≤b≤1.6 mol %, relative to M′,
Al in a content c, wherein 0.00≤c≤1.5 mol %, relative to M′,
W in a content d, wherein 0.00≤d≤1.5 mol %, relative to M′,
wherein x, y, z, a, b, c, and d are measured by ICP-OES,
wherein x+y+z+a+b+c+d is 100.0 mol %,
wherein the positive electrode active material has a B content B A defined as

b

(

x
+
y
+
z
+
b
+
c
+
d

)

,

wherein the positive electrode active material has a B content B B wherein B B is determined by XPS analysis, wherein B B is expressed as molar fraction compared to the sum of molar fractions of Ni, Mn, Co, B, Al, and W, as measured by XPS analysis,
wherein the ratio B B /B A >10.0, and

wherein the material is a single-crystalline powder.

26 . The positive electrode active material according to claim 25 , wherein 50.0≤x≤70.0.

27 . The positive electrode active material according to claim 25 , wherein 70.0≤x≤95.0.

28 . The positive electrode active material according to claim 25 , wherein the ratio B B /B A >30.0.

29 . The positive electrode active material according to claim 25 , wherein the B content b is ≥0.05 mol %, relative to M′, as measured by ICP-OES.

30 . The positive electrode active material according to claim 25 , wherein the Al content is 0.01 mol %≤c≤1.5 mol %, relative to M′ as measured by ICP-OES.

31 . The positive electrode active material according to claim 25 , wherein the positive electrode active material has an Al content Al A defined as

c

(

x
+
y
+
z
+
b
+
c
+
d

)

,

wherein the positive electrode active material has an Al content Al B determined by XPS analysis, wherein Al B is expressed as molar fraction compared to the sum of molar fractions of Co, Mn, Ni, B, Al, and W, as measured by XPS analysis, wherein the ratio Al B /Al A >10.0.

32 . The positive electrode active material according to claim 25 , wherein the ratio Al B /Al A ≥30.

33 . The positive electrode active material according to claim 25 , wherein the ratio B B /B A <300.

34 . The positive electrode active material according to claim 25 , wherein the ratio Al B /Al A <300.

35 . The positive electrode active material according to claim 25 , wherein the W content is 0.01 mol %≤d≤2.0 mol %, relative to M′, as measured by ICP-OES.

36 . The positive electrode active material according to claim 25 , wherein the positive electrode active material has a W content W A defined as

d

(

x
+
y
+
z
+
b
+
c
+
d

)

,

wherein the positive electrode active material has a W content W B determined by XPS analysis, wherein W B is expressed as molar fraction compared to the sum of molar fractions of Co, Mn, Ni, B, Al, and W, as measured by XPS analysis, wherein the ratio W B /W A >10.0.

37 . The positive electrode active material according to claim 25 , wherein the ratio W B /W A >20.

38 . The positive electrode active material according to claim 25 , wherein the ratio W B /W A <300.

39 . The positive electrode active material according to claim 25 , wherein the positive electrode active material has a median particle size D50 of between 2.0 m and 10.0 m, as determined by laser diffraction particle size analysis.

40 . The positive electrode active material according to claim 25 , wherein the solid-state rechargeable battery is a sulfide based solid-state battery.

41 . The positive electrode active material according to claim 25 , wherein the solid-state battery comprises a solid electrolyte, and wherein the solid electrolyte is a sulfur containing compound.

42 . A catholyte for a solid-state rechargeable battery comprising a positive electrode active material and a solid electrolyte, and wherein the positive electrode active material comprises Li, M′, and oxygen, wherein M′ comprises:
Ni in a content x, wherein 50≤y≤95.0 mol %, relative to M′,
Co in a content y, wherein 0≤y≤40.0 mol %, relative to M′,
Mn in a content z, wherein 0≤z≤70.0 mol %, relative to M′,
an element other than Li, O, Ni, Co, Mn, Al, B, and W in a content a, wherein 0≤a≤2.0 mol %, relative to M′, and,
B in a content b, wherein 0.01≤b≤1.6 mol %, relative to M′,
Al in a content c, wherein 0.00≤c≤1.5 mol %, relative to M′,
W in a content d, wherein 0.00≤d≤1.5 mol %, relative to M′,
wherein x, y, z, a, b, c, and d are measured by ICP-OES,
wherein x+y+z+a+b+c+d is 100.0 mol %,
wherein the positive electrode active material has a B content B A defined as

b

(

x
+
y
+
z
+
b
+
c
+
d

)

,

wherein the positive electrode active material has a B content B B wherein B B is determined by XPS analysis, wherein B B is expressed as molar fraction compared to the sum of molar fractions of Ni, Mn, Co, B, Al, and W, as measured by XPS analysis,
wherein the ratio B B /B A >10.0, and
wherein the material is a single-crystalline powder.

43 . The catholyte according to claim 42 , wherein the solid electrolyte is a sulfide based electrolyte.

44 . A positive electrode for a solid-st

Assignees

• Umicore Nv

Inventors

• Kumakura Shinichi
• Kang Jihoon
• Park Gyeongseo

Classifications

• C01P2006/40

  Electric properties · CPC title

• C01P2004/61

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

• C01P2002/50

  Solid solutions · CPC title

• C01G53/44

  containing manganese · CPC title

• H01M2300/0068

  inorganic · CPC title