Binder for capacitive deionization electrode and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-10259904-B2
Application number	US-201514983117-A
Country	US
Kind code	B2
Filing date	Dec 29, 2015
Priority date	Dec 17, 2015
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

A binder for capacitive deionization electrode is provided, which is formed by reacting a polyether polyol, a diisocyanate, and a diol having a hydrophobic side chain. The binder may bind an electrode material and to form a capacitive deionization electrode. The electrode material and the binder may have a weight ratio of 90:5 to 90:25.

First claim

What is claimed is:

1. A binder for a capacitive deionization electrode, being formed by reacting substances consisting essentially of a hydrophobic polyether polyol, a diisocyanate, and a diol having a hydrophobic side chain,
wherein the binder has a number average molecular weight of greater than 1.6×10 5 ,
wherein the diol having the hydrophobic side chain comprises C 12-26 monoglyceride, C 12-26 fatty acid dimer, or a combination thereof, and
wherein the hydrophobic polyether polyol and the diisocyanate have a molar ratio of 1:3 to 1:20, and the hydrophobic polyether polyol and the diol having the hydrophobic side chain have a molar ratio of 1:1 to 1:6.

2. The binder as claimed in claim 1 , wherein the diisocyanate comprises hexamethylene diisocyanate, toluene diisocyanate, methylenediphenyl diisocyanate, or a combination thereof.

3. The binder as claimed in claim 1 , wherein the hydrophobic polyether polyol comprises polytetramethylene ether glycol, polypropylene glycol, or a combination thereof.

4. The binder as claimed in claim 1 , wherein the hydrophobic polyether polyol has a number average molecular weight of 1000 to 5000.

5. The binder as claimed in claim 1 , being applied to adhere an active material in an electrode, wherein the active material includes activated carbon material, carbon nanotube, graphene, or a combination thereof, and the active material and the binder have a weight ratio of 90:5 to 90:25.

6. The binder as claimed in claim 5 , wherein the active material has a specific surface area of 300 m 2 /g to 3000 m 2 /g and a pore size of 1 nm to 1000 nm.

7. The binder as claimed in claim 5 , wherein the electrode further comprises 5 to 20 parts by weight of a conductive material, and the conductive material includes graphite, carbon black, acetylene black, carbon nanotube, graphene, or a combination thereof.

8. A method of forming a binder for a capacitive deionization electrode, comprising:
mixing a hydrophobic polyether polyol, a diisocyanate, and a diol having a hydrophobic side chain to react to form the binder according to claim 1 .

9. The method as claimed in claim 8 , wherein the diisocyanate comprises hexamethylene diisocyanate, toluene diisocyanate, methylenediphenyl diisocyanate, or a combination thereof.

10. The method as claimed in claim 8 , wherein the hydrophobic polyether polyol comprises polytetramethylene ether glycol, polypropylene glycol, or a combination thereof.

11. The method as claimed in claim 8 , wherein the hydrophobic polyether polyol has a number average molecular weight of 1000 to 5000.

12. The method as claimed in claim 8 , wherein the binder is applied to adhere an active material in an electrode, wherein the active material includes activated carbon material, carbon nanotube, graphene, or a combination thereof, and the active material and the binder have a weight ratio of 90:5 to 90:25.

13. The method as claimed in claim 12 , wherein the active material has a specific surface area of 300 m 2 /g to 3000 m 2 /g and a pore size of 1 nm to 1000 nm.

14. The method as claimed in claim 12 , wherein the electrode further comprises 5 to 20 parts by weight of a conductive material, and the conductive material includes graphite, carbon black, acetylene black, carbon nanotube, graphene, or a combination thereof.

Assignees

• Ind Tech Res Inst

Inventors

• Liu Po-I
• Chung Li-Ching
• Liang Teh-Ming
• Horng Ren-Yang
• Shao Hsin
• Chen Ruei-Shin
• Fan Hsu-Tzu
• Fang Chih-Hsiang
• Chang Min-Chao

Classifications

• C08G18/36

  Hydroxylated esters of higher fatty acids · CPC title

• H01M4/622

  being polymers · CPC title

• C02F1/4691

  Capacitive deionisation · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title

• C08G18/6696

  with compounds of group C08G18/36 or hydroxylated esters of higher fatty acids of C08G18/38 · CPC title