Liquid composition for forming electrochemical device, method of manufacturing electrodes, method of manufacturing electrochemical device and electrodes

Patent metadata

Field	Value
Publication number	US-11749805-B2
Application number	US-202117158202-A
Country	US
Kind code	B2
Filing date	Jan 26, 2021
Priority date	Jan 28, 2020
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

The present invention relates to a liquid composition for forming an electrochemical device contains one or both of an active material or an electrolyte;a dispersion medium; and a polymer, wherein the polymer contains constituent units having one or both of an amide bond or an imide bond, and having a group represented by a following general formula (I):wherein X is an oxygen atom, or a carbon atom substituted with a hydrogen atom or an alkyl group, wherein R1, R2, R3, and R4 are each independently hydrogen atoms, substituted or unsubstituted alkyl groups, or substituted or unsubstituted cycloalkyl groups, and m and n are positive integers.

First claim

What is claimed is:

1. A liquid composition for forming an electrochemical device, comprising:
one or both of an active material and an electrolyte;
a dispersion medium; and
a polymer,
wherein the polymer contains constituent repeating units having an amide bond and an imide bond,
wherein the polymer is a polyamideimide resin containing repeating units having a group represented by a following general formula (I), and
wherein the constituent repeating units having the amide bond and the imide bond and the repeating units having the group represented by the following general formula (I) are bonded by an ester bond through an oxygen atom contained in the general formula (I):

wherein X is an oxygen atom, wherein R 1 , R 2 , R 3 , and R 4 are each independently hydrogen atoms, substituted or unsubstituted alkyl groups, and m and n are positive integers.

2. The liquid composition according to claim 1 , comprising:
the active material;
the dispersion medium; and
a polymer,
wherein the polymer contains constituent repeating units having both an amide bond and an imide bond, and repeating units having a group represented by the following general formula (II):

wherein, R 1 , R 2 , R 3 , and R 4 are each independently hydrogen atoms, substituted or unsubstituted alkyl groups, and n is a positive integer.

3. The liquid composition according to claim 1 , wherein the polymer is dissolved in the dispersion medium.

4. The liquid composition according to claim 1 , comprising the active material and wherein the active material is present in the liquid composition in an amount of 10% by mass or more.

5. The liquid composition according to claim 1 , comprising the active material and wherein the active material is one or more compounds selected from the group consisting of a lithium-containing transition metal compound, a lithium-containing transition metal phosphate compound, and carbon materials.

6. The liquid composition according to claim 5 , further comprising:
a conductive agent,
wherein the lithium-containing transition metal phosphate compound is present and is composited with the conductive agent, and the conductive agent is the carbon materials.

7. The liquid composition according to claim 1 , wherein a viscosity of the liquid composition at 25° C. is 200 mPa·s or less.

8. The liquid composition according to claim 1 , wherein the active material is present and contains lithium, and the dispersion medium is a non-aqueous dispersion medium.

9. The liquid composition according to claim 1 , wherein a viscosity of the liquid composition at 25° C. is 50 mPa·s or less.

10. The liquid composition according to claim 1 , wherein the active material is present and the mass ratio of the polymer to the active material is 1 to 10%.

11. The liquid composition according to claim 1 , wherein the repeating units of the polymer consist of the constituent repeating units having an amide bond and an imide bond and the repeating units having a group represented by the formula (I).

12. The liquid composition according to claim 2 , wherein the repeating units of the polymer consist of the constituent repeating units having an amide bond and an imide bond and the repeating units having a group represented by the formula (I).

13. A method of manufacturing electrodes, comprising:
coating the liquid composition for forming an electrochemical device of claim 1 onto an electrode substrate.

14. The method of manufacturing electrodes according to claim 13 , comprising:
discharging the liquid composition onto an electrode substrate.

15. The method of manufacturing electrodes according to claim 14 , further comprising:
applying pressure to the electrode substrate on which the liquid composition for forming an electrochemical device has been discharged.

16. A method of manufacturing an electrochemical device, comprising:
manufacturing electrodes using the method of claim 13 .

17. An electrode manufactured by the method of manufacturing an electrode of claim 13 .

Assignees

• Ricoh Co Ltd

Inventors

• Sagisaka Toshiya
• Kuriyama Hiromichi
• Nakajima Satoshi
• Tantitarntong Porraphon

Classifications

• H01M4/622 Primary

  being polymers · CPC title

• H01M4/0416

  involving impregnation with a solution, dispersion, paste or dry powder (H01M4/0438 takes precedence) · CPC title

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/1397

  of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• H01M4/505

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