Positive electrode active material for rechargeable batteries

Patent metadata

Field	Value
Publication number	US-12525603-B2
Application number	US-202118265599-A
Country	US
Kind code	B2
Filing date	Dec 17, 2021
Priority date	Dec 18, 2020
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A positive electrode active material for solid state rechargeable batteries, whereby the positive electrode active material is a powder which comprises Li, M′, and O, wherein M′ consists of Co in a content x superior or equal to 2.0 mol % and inferior or equal to 35.0 mol %, Mn in a content y superior or equal to 0 mol % and inferior or equal to 35.0 mol %, A in a content m superior or equal to 0 mol % and inferior or equal to 5 mol %, whereby A comprises at least one element of the group consisting of: Al, Ba, B, Mg, Nb, Sr, Ti, W, S, Ca, Cr, Zn, V, Y, Si, and Zr, Ni in a content of 100-x-y-m mol %, a first compound which comprises Li 2 WO 4 and a second compound which comprises WO 3 , whereby the powder is a single-crystalline powder, whereby the positive electrode active material comprises Li in a molar ratio of Li/(Co+Mn+Ni+A) of at least 0.9 and at most 1.1, whereby the positive electrode active material has a tap density which is at least 1.0 gr/cm 3 and at most 3.0 g/cm 3 .

First claim

The invention claimed is:

1 . A positive electrode active material for solid state rechargeable batteries, whereby the positive electrode active material is a powder which comprises
i. Li, M′, and O, wherein M′ consists of:
Co in a content x greater than or equal to 2.0 mol % and less than or equal to 35.0 mol %, relative to the molar composition of M′,
Mn in a content y greater than or equal to 0 mol % and less than or equal to 35.0 mol %, relative to the molar composition of M′,
A in a content m greater than or equal to 0 mol % and less than or equal to 5 mol %, relative to the molar composition of M′, whereby A comprises at least one element of the group consisting of: Al, Ba, B, Mg, Nb, Sr, Ti, W, S, Ca, Cr, Zn, V, Y, Si, and Zr, and
Ni in a content of 100-x-y-m mol %,
ii. a first compound which comprises Li 2 WO 4 iii. and a second compound which comprises WO 3 , wherein the total content of tungsten is between 0.42 wt. % and 2.50 wt. % with respect to the total weight of said positive electrode active material, as determined by ICP-OES analysis, and wherein the total content of tungsten includes tungsten present in the first compound and the second compound,
whereby the powder is a single-crystalline powder,
whereby the positive electrode active material comprises Li in a molar ratio of Li/(Co+Mn+Ni+A) of at least 0.9 and at most 1.1,
whereby the positive electrode active material has a tap density which is at least 1.0 g/cm 3 and at most 3.0 g/cm 3 .

2 . The positive electrode active material according to claim 1 , whereby the positive electrode active material comprises a third compound which has a crystal structure which belongs to the R-3m space group.

3 . The positive electrode active material according to claim 1 , whereby the positive electrode active material comprises a third compound which is a Li-M′-oxide.

4 . The positive electrode active material according to claim 1 , whereby said first compound has a crystal structure which belongs to the R-3 space group, and whereby said second compound has a crystal structure which belongs to the P21/n space group, as determined by X-Ray diffraction analysis.

5 . The positive electrode active material according to claim 1 , wherein the total content of tungsten is between 0.42 wt. % and 2.00 wt. % with respect to the total weight of said positive electrode active material, as determined by ICP-OES analysis.

6 . The positive electrode active material according to claim 1 , wherein the positive electrode active material has a median particle size D50 of between 2 μm and 7 μm, as determined by laser diffraction particle size analysis.

7 . The positive electrode active material according to claim 1 , whereby m is less than 2.0 mol %, relative to the molar composition of M′.

8 . The positive electrode active material according to claim 1 , whereby the first compound is Li 2 WO 4 .

9 . The positive electrode active material according to claim 1 , whereby the second compound is WO 3 .

10 . The positive electrode active material according to claim 1 , wherein Ni content 100-x-y-m is between 60 mol % to 95 mol %, relative to M′.

11 . The positive electrode active material according to claim 1 , wherein the tap density is between 1.5 g/cm 3 and 2.7 g/cm 3 .

12 . A solid state battery comprising a positive electrode active material according to claim 1 .

13 . A battery cell comprising a positive electrode active material according to claim 1 .

14 . A portable computer, a tablet, a mobile phone, an electrically powered vehicle, or an energy storage system comprising a positive electrode active material according to claim 1 .

15 . The positive electrode active material according to claim 1 , wherein the total content of tungsten is between 0.42 wt. % and 1.5 wt. % with respect to the total weight of said positive electrode active material, as determined by ICP-OES analysis.

16 . The positive electrode active material according to claim 1 , wherein the total content of tungsten is between 0.42 wt. % and 1.42 wt. % with respect to the total weight of said positive electrode active material, as determined by ICP-OES analysis.

17 . The positive electrode active material according to claim 16 , wherein the Ni content 100-x-y-m is between 67 mol % to 83 mol %, relative to M′.

Assignees

• Umicore Nv

Inventors

• Paulsen Jens Martin
• Kumakura Shinichi
• Zhu Liang
• Kim Jihye
• Kang Jihoon
• Yang Hyejeong
• Lee Yuri

Classifications

• H01M2004/028

  Positive electrodes · 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

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• C01P2006/11

  Powder tap density · CPC title