Conductive material dispersed liquid, electrode composition, electrode for rechargeable lithium batteries, and rechargeable lithium batteries

Patent metadata

Field	Value
Publication number	US-2025364563-A1
Application number	US-202519034442-A
Country	US
Kind code	A1
Filing date	Jan 22, 2025
Priority date	May 21, 2024
Publication date	Nov 27, 2025
Grant date	—

Abstract

Disclosed are conductive material dispersion liquid including nanocarbon, a fluorine-containing lithium salt, a solvent, an electrode composition, an electrode for a rechargeable lithium battery, and a rechargeable lithium battery.

First claim

What is claimed is:

1 . A conductive material dispersed liquid comprising:
nanocarbon, a fluorine-containing lithium salt, and a solvent.

2 . The conductive material dispersed liquid as claimed in claim 1 , wherein a viscosity of the conductive material dispersed liquid is in a range of about 100 cps to about 2,000 cps.

3 . The conductive material dispersed liquid as claimed in claim 1 , wherein a total solid content of the nanocarbon and the fluorine-containing lithium salt is in a range of about 1 wt % to about 20 wt % based on 100 wt % of the conductive material dispersed liquid.

4 . The conductive material dispersed liquid as claimed in claim 1 , wherein the fluorine-containing lithium salt comprises at least one of LiPF 6 , LiBF 4 , lithium bis(fluorosulfonyl)imide (LiFSI), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), lithium bis(oxalato)borate (LiBOB), and lithium difluoro(oxalato)borate (LiDFOB).

5 . The conductive material dispersed liquid as claimed in claim 1 , wherein the fluorine-containing lithium salt comprises a fluorine-containing imide-based lithium salt.

6 . The conductive material dispersed liquid as claimed in claim 1 , wherein the fluorine-containing lithium salt is included in an amount in a range of about 0.001 wt % to about 1 wt % based on 100 wt % of the conductive material dispersed liquid.

7 . The conductive material dispersed liquid as claimed in claim 1 , wherein the nanocarbon comprises at least one of carbon black, carbon nanotube, fullerene, and graphene.

8 . The conductive material dispersed liquid as claimed in claim 1 , wherein the nanocarbon has a zeta potential in a range of about ±10 mV to about ±25 mV.

9 . The conductive material dispersed liquid as claimed in claim 1 , wherein the nanocarbon is included in an amount in a range of about 1 wt % to about 20 wt % based on 100 wt % of the conductive material dispersed liquid.

10 . The conductive material dispersed liquid as claimed in claim 1 , wherein a W value defined by Equation 1 is in a range of about 150 to about 20,000:

W
=

W
S

/

W
F

,

Equation
⁢

1

and
wherein, in Equation 1, W S represents a weight percent content of the sum of nanocarbon and fluorine-containing lithium salt relative to 100 wt % of the conductive material dispersed liquid, and W F represents the weight percent content of the fluorine-containing lithium salt relative to 100 wt % of the conductive material dispersed liquid.

11 . The conductive material dispersed liquid as claimed in claim 1 , wherein the conductive material dispersed liquid is included in an electrode composition of a rechargeable lithium battery.

12 . The conductive material dispersed liquid as claimed in claim 1 , wherein an electrode active material is not included.

13 . An electrode composition comprising:
the conductive material dispersed liquid claimed in claim 1 ; and an electrode active material.

14 . The electrode composition as claimed in claim 13 , wherein an electrode that comprises the electrode composition is a positive electrode.

15 . An electrode for a rechargeable lithium battery comprising the electrode composition as claimed in claim 13 .

16 . A rechargeable lithium battery, comprising
a positive electrode; a negative electrode; and an electrolyte; wherein at least one of the positive electrode and the negative electrode comprises the electrode as claimed in claim 15 .

Assignees

• Samsung Sdi Co Ltd

Inventors

• Lee Seongsun
• Oh Songyul
• Lee Minju
• Lee Junsik
• Kang Younghye
• Lee Boram
• Ko Donghyun
• Choi Kyuhwan

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• C01B32/174

  Derivatisation; Solubilisation; Dispersion in solvents · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/13 Primary

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title