Oxide mixture and complex oxide coatings for cathode materials

Patent metadata

Field	Value
Publication number	US-11695108-B2
Application number	US-201916529545-A
Country	US
Kind code	B2
Filing date	Aug 1, 2019
Priority date	Aug 2, 2018
Publication date	Jul 4, 2023
Grant date	Jul 4, 2023

Abstract

Cathode active materials are provided. The cathode active material can include a plurality of cathode active compound particles. A coating is disposed over each of the cathode active compound particles. The coating can include at least one of ZrO2, La2O3, a mixture of Al2O3 and ZrO2 or a mixture of Al2O3 and La2O3. The battery cells that include the cathode active material are also provided.

First claim

We claim:

1. A cathode active material comprising:
a plurality of cathode active compound particles; and
a coating disposed over each of the cathode active compound particles; the coating comprising a mixture of Al 2 O 3 and ZrO 2 or a mixture of La 2 O 3 and Al 2 O 3 ;
wherein if the coating is a mixture of La 2 O 3 and Al 2 O 3 , the coating comprises aluminum from 40 ppm to 300 ppm and lanthanum from 200 ppm to 2000 ppm, and
wherein if the coating is a mixture of Al 2 O 3 and ZrO 2 , the coating comprises aluminum from 40 ppm Al to 300 ppm Al and from 1000 ppm to 2000 ppm zirconium.

2. The cathode active material of claim 1 , wherein the coating comprises a mixture of La 2 O 3 and Al 2 O 3 having a molar ratio of La to Al equal to 0.01 to 5.0.

3. The cathode active material of claim 1 , wherein the cathode active compound particles comprise a compound of Formula (X):
Li α Co 1−x−y M y Mn x O δ   (X)

wherein
M is at least one element selected from the group consisting of B, Na, Mg, Ti, Ca, V, Cr, Fe, Co, Ni, Cu, Zn, Al, Sc, Y, Ga, Zr, Ru, and Mo;
0.95≤α≤1.05;
0<x≤0.30;
0≤y≤0.10; and
1.98≤δ≤2.04.

4. The cathode active material of claim 3 , wherein 0.95≤α<0.99.

5. A cathode comprising the coated cathode active material of claim 1 .

6. A battery cell, comprising:
an anode comprising an anode current collector,
the cathode according to claim 5 ; and
a separator disposed between the anode and the cathode.

7. The battery cell of claim 6 , wherein the battery cell has a discharge energy greater than or equal to 710 Wh/kg after 25 cycles.

8. The battery cell of claim 6 , wherein the battery cell has a first-cycle energy retention of at least 90% after 30 discharge cycles.

9. The battery cell of claim 6 , wherein the battery cell has a first-cycle energy retention of at least 95% after 30 discharge cycles.

Assignees

• Apple Inc

Inventors

• Wang Dapeng
• Wu Huiming
• Dai Hongli
• Wang Xiaoping
• Gilbert James
• Carter John David
• Yang Zhenzhen
• Vu Anh
• Li Yan
• Cui Yanjie
• Johnson Christopher S
• Kropf Arthur Jeremy
• Iddir Hakim H

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• C01P2006/40

  Electric properties · CPC title

• H01M4/366 Primary

  as layered products · CPC title