A positive electrode active material for rechargeable batteries

Patent metadata

Field	Value
Publication number	US-2024030408-A1
Application number	US-202118265599-A
Country	US
Kind code	A1
Filing date	Dec 17, 2021
Priority date	Dec 18, 2020
Publication date	Jan 25, 2024
Grant date	—

Abstract

A positive electrode active material for solid state rechargeable batteries, whereby the positive electrode active material is a powder which comprises Li, NI, and 0, 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 Li2WO4 and a second compound which comprises WO3, 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/cm3 and at most 3.0 g/cm3.

First claim

1 - 15 . (canceled)

16 . 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 %, relative to M′,
Mn in a content y superior or equal to 0 mol % and inferior or equal to 35.0 mol %, relative to M′,
A in a content m superior or equal to 0 mol % and inferior or equal to 5 mol %, relative to 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,
Ni in a content of 100-x-y-m mol %,
i. a first compound which comprises Li 2 WO 4
ii. 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 .

17 . Positive electrode active material according to claim 16 , whereby the positive electrode active material comprises a third compound which has a crystal structure which belongs to the R-3m space group.

18 . Positive electrode active material according to claim 16 , whereby the positive electrode active material comprises a third compound which is a Li-M′-oxide.

19 . Positive electrode active material according to claim 16 , 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.

20 . Positive electrode active material according to claim 16 , wherein the total content of tungsten is between 0.20 wt. % and 2.50 wt. % with respect to the total weight of said positive electrode active material, as determined by ICP-OES analysis.

21 . Positive electrode active material according to claim 16 , wherein the total content of tungsten is between 0.30 wt. % and 2.00 wt. % with respect to the total weight of said positive electrode active material, as determined by ICP-OES analysis.

22 . Positive electrode active material according to claim 16 , 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.

23 . Positive electrode active material according to claim 16 , whereby m is inferior to 2.0 mol %, relative to M′.

24 . Positive electrode active material according to claim 16 , whereby the first compound is Li 2 WO 4 .

25 . Positive electrode active material according to claim 16 , whereby the second compound is WO 3 .

26 . Positive electrode active material according to claim 16 , wherein Ni content 100-x-y-m is between 60 mol % to 95 mol %, relative to M′.

27 . Positive electrode active material according to claim 16 , wherein the tap density is between 1.5 g/cm 3 to 2.7 g/cm 3 .

28 . A solid state battery comprising a positive electrode active material according to claim 16 .

29 . Battery cell comprising a positive electrode active material according to claim 16 .

30 . 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 16 .

Assignees

• Umicore Nv

Inventors

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

Classifications

• H01M4/364 Primary

  as mixtures · 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

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/505

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