公开(公告)号：US20240243277A1

公开(公告)日：2024-07-18

申请号：US18562318

申请日：2022-05-27

Applicant: UMICORE

Inventor： Bin-Na YUN ,  KyungSub JUNG ,  Ji-Yeong KWON ,  Woon-Hyoung RYU ,  SeungHwan LEE ,  Maxime BLANGERO

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/04 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/525 ,  H01M4/0471 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/028

Abstract: The present invention provides a positive electrode active material for lithium-ion rechargeable batteries, wherein the positive electrode active material comprises Li, M′, and oxygen, wherein M′ comprises:



Ni in a content x between 60.0 mol % and 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′;
D in a content a, wherein 0≤a≤2.0 mol %, relative to M′, wherein D comprises an element other than Li, O, Ni, Co, Mn, F, W and S;
F in a content b, wherein b>0, preferably b is between 0.1 mol % and 4.0 mol %, relative to M′;
W in a content c, wherein c>0, preferably 0.01≤c≤4.0 mol %, relative to M′;
S in a content d, wherein d>0, preferably between 0.01 mol % and 3.0 mol %, relative to M′; and,
B in a content e, wherein 0≤e≤4.0 mol %, relative to M′; and,
wherein x, y, z, a, c, and d are measured by Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES),
wherein b is measured by Ion chromatography (IC),
wherein x+y+z+a+b+c+d is 100.0 mol %,

wherein the positive electrode active material has a F content FA defined as










b

(

x
+
y
+
z
+
b
+
c
+
d

)


,




W content WA defined as





c

(

x
+
y
+
z
+
b
+
c
+
d

)


,




and S content SA defined as





d

(

x
+
y
+
z
+
b
+
c
+
d

)


,




wherein the positive electrode active material has a F content FB, W content WB, and S content SB wherein FB, WB, and SB are determined by X-ray photoelectron spectroscopy (XPS) analysis, wherein FB, WB, and SB are each expressed as molar fraction compared to the sum of molar fractions of Co, Mn, Ni, F, W and S as measured by XPS analysis,

wherein the ratio FB/FA>1.0,

wherein the ratio WB/WA>1.0, and

wherein the ratio SB/SA>1.0.

公开(公告)号：US20160006026A1

公开(公告)日：2016-01-07

申请号：US14855478

申请日：2015-09-16

Applicant: Umicore

Inventor： Jens PAULSEN ,  Maxime BLANGERO

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525

CPC classification number: H01M4/366 ,  C01G51/42 ,  C01G53/50 ,  C01P2002/50 ,  C01P2002/52 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/52 ,  C01P2004/53 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/40 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/028 ,  Y10T428/2982

Abstract: Disclosed is a cathode active material and a method to produce the same at low cost. The cathode powder comprises modified LiCoO2, and possibly a second phase which is LiM′O2 where M′ is Mn, Ni, Co with a stoichiometric ratio Ni:Mn≧1. The modified LiCoO2 is Ni and Mn bearing and has regions of low and high manganese content, where regions with high manganese content are located in islands on the surface. The cathode material has high cycling stability, a very high rate performance and good high temperature storage properties.

Abstract translation: 公开了一种正极活性物质及其制造方法，成本低廉。 阴极粉末包含改性的LiCoO 2，可能的第二相是LiM'O2，其中M'是Mn，Ni，Co，化学计量比Ni:Mn≥1。 改性LiCoO2为Ni和Mn载体，锰含量低，锰含量高的地区，锰含量高的区域位于表面的岛上。 阴极材料具有高的循环稳定性，非常高的速率性能和良好的高温储存性能。