Lithium-chromium-iron disordered rock-salt battery cathode materials and syntheses thereof

Patent metadata

Field	Value
Publication number	US-2025171329-A1
Application number	US-202418897588-A
Country	US
Kind code	A1
Filing date	Sep 26, 2024
Priority date	Nov 29, 2023
Publication date	May 29, 2025
Grant date	—

Abstract

A cathode for a battery includes a cathode material with the chemical formula Li1+δFexCryO2 where 0≤δ≤1, and δ+x+y=2. In some variations, the cathode material has a disordered rock-salt crystal structure and the chemical formula Li1+δFexCryO2 where 0≤δ≤1, and δ+x+y=2. And in at least one variations, a method of forming the cathode material includes wet ball milling solid precursors of lithium, iron, and chromium and forming a slurry, drying the slurry and forming a powder, sintering the powder, and dry ball milling the powder and forming the cathode material with the disordered rock-salt crystal structure and the chemical formula Li1+δFexCryO2 where 0≤δ≤1, and δ+x+y=2.

First claim

What is claimed is:

1 . A cathode for a battery, the cathode comprising:
a cathode material with the chemical formula Li 1+δ Fe x Cr y O 2 where 0≤δ≤1, and δ+x+y=2.

2 . The cathode according to claim 1 , wherein the cathode material comprises a disordered rock-salt crystal structure.

3 . The cathode according to claim 2 , wherein 0≤δ≤0.5, x≤0.5, and y>0.5.

4 . The cathode according to claim 3 , wherein 0≤δ≤0.4, x≤0.4, and y>0.5.

5 . The cathode according to claim 4 , wherein 0≤δ≤0.3, x≤0.3, and y>0.5.

6 . The cathode according to claim 5 , wherein 0≤δ≤0.3, x≤0.25, and y>0.5.

7 . The cathode according to claim 1 , wherein the cathode material is LiFe 0.25 Cr 0.75 O 2 .

8 . The cathode according to claim 1 , wherein the cathode material is Li 1.2 Fe 0.2 Cr 0.6 O 2 .

9 . The cathode according to claim 1 , wherein the cathode material is selected from the group consisting of LiFe 0.25 Cr 0.75 O 2 and Li 1.2 Fe 0.2 Cr 0.6 O 2 .

10 . A cathode for a battery, the cathode comprising:
a cathode material with a disordered rock-salt crystal structure and the chemical formula Li 1+δ Fe x Cr y O 2 where 0≤δ≤1, and δ+x+y=2.

11 . The cathode according to claim 10 , wherein 0≤δ≤0.5, x≤0.5, and y>0.5.

12 . The cathode according to claim 11 , wherein 0≤δ≤0.4, x≤0.4, and y>0.5.

13 . The cathode according to claim 12 , wherein 0≤δ≤0.3, x≤0.3, and y>0.5.

14 . The cathode according to claim 13 , wherein 0≤δ≤0.3, x≤0.25, and y>0.5.

15 . The cathode according to claim 10 , wherein the cathode material is LiFe 0.25 Cr 0.75 O 2 .

16 . The cathode according to claim 10 , wherein the cathode material is Li 1.2 Fe 0.2 Cr 0.6 O 2 .

17 . The cathode according to claim 16 , wherein the cathode material is selected from the group consisting of LiFe 0.25 Cr 0.75 O 2 and Li 1.2 Fe 0.2 Cr 0.6 O 2 .

18 . A solid-state method for forming a lithium, iron, chromium containing cathode material for a battery, the solid-sate method comprising:
wet ball milling solid precursors of lithium, iron, and chromium and forming a slurry; drying the slurry and forming a powder; sintering the powder; and dry ball milling the powder and forming a cathode material with a disordered rock-salt crystal structure and the chemical formula Li 1+δ Fe x Cr y O 2 where 0≤δ≤1, and δ+x+y=2.

19 . The solid-sate method according to claim 18 , wherein 0≤δ≤0.5, x≤0.5, and y>0.5.

20 . The solid-sate method according to claim 18 , wherein the cathode material is selected from the group consisting of LiFe 0.25 Cr 0.75 O 2 and Li 1.2 Fe 0.2 Cr 0.6 O 2 .

Assignees

• Toyota Res Inst Inc
• Toyota Motor Co Ltd
• Univ Northwestern

Inventors

• Torrisi Steven Bartholomew Joseph
• Wolverton Christopher
• Zhu Yizhou
• Liu Tzu-Chen
• Baldassarri Bianca
• Salgado-Casanova Adolfo
• Aykol Muratahan
• Yubuchi So
• Yamasaki Hisatsugu
• Yoshida Jun

Classifications

• 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

• H01M4/505

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

• C01G49/009

  Compounds containing iron, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01G49/0018 Primary

  Mixed oxides or hydroxides, (C01G49/0009 takes precedence) · CPC title

• H01M2004/028

  Positive electrodes · CPC title