Method for manufacturing electrode for fuel cell and electrode manufactured thereby

Patent metadata

Field	Value
Publication number	US-10439230-B2
Application number	US-201715651550-A
Country	US
Kind code	B2
Filing date	Jul 17, 2017
Priority date	Jul 21, 2016
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

A method for manufacturing an electrode for a fuel cell includes a mixing step of producing a first mixed solution by mixing a carbon support, a metal catalyst, a binder and a first dispersion solvent, a drying step of producing a first mixed solution dried body by drying the first mixed solution, a heat treatment step of heating the first mixed solution dried body, a second mixed solution production step of producing a second mixed solution by dissolving the heat-treated first mixed solution dried body in a second dispersion solvent, and a release paper coating step of producing an electrode by coating the second mixed solution onto a release paper, and then drying the second mixed solution.

First claim

What is claimed is:

1. A method for manufacturing an electrode for a fuel cell, the method comprising:
a mixing step of producing a first mixed solution by mixing a carbon support, a metal catalyst, a binder and a first dispersion solvent;
a drying step of producing a first mixed solution dried body by drying the first mixed solution;
a second mixed solution production step of producing a second mixed solution by dissolving the first mixed solution dried body in a second dispersion solvent; and
a release paper coating step of producing an electrode by coating the second mixed solution onto a release paper, and then drying the second mixed solution,
wherein a radical scavenger is introduced in the mixing step of producing the first mixed solution and the step of producing the second mixed solution, a partial aliquot in the total amount of the radical scavenger is introduced during the production of the first mixed solution, and another aliquot of the radical scavenger is introduced in the second mixed solution production step.

2. The method of claim 1 , wherein the first dispersion solvent in the mixing step includes one or more of distilled water, ethanol, isopropyl alcohol (IPA), propanol, ethoxy ethanol, butanol, ethylene glycol and amyl alcohol.

3. The method of claim 1 , wherein in the drying step, the first mixed solution is spray dried with a spray dryer.

4. The method of claim 1 , wherein in the drying step, the first mixed solution is dried with an oven.

5. The method of claim 1 , wherein the second dispersion solvent in the second mixed solution production step includes one or more of ethanol, IPA, propanol, ethoxy ethanol, butanol, ethylene glycol, distilled water and amyl alcohol.

6. The method of claim 1 , wherein a partial aliquot in a total amount of the binder used during the production of the first mixed solution is introduced during the production of the first mixed solution, and another aliquot of the binder is introduced in the second mixed solution production step.

7. The method of claim 1 , wherein the radical scavenger is a nano particle having a diameter of 1 nm to 20 nm on average and includes any one or more oxides selected from the group consisting of cerium oxide, zirconium oxide, manganese oxide, aluminum oxide and vanadium oxide.

8. The method of claim 1 , wherein the carbon support is any one or more materials selected from the group consisting of carbon black, carbon nano tube (CNT), carbon nano fiber (CNF), carbon powder, carbon black, acetylene black, ketjen black, activated carbon, carbon nano wire, carbon nano horn, carbon aerogel, carbon xerogel and carbon nano ring.

9. The method of claim 1 , wherein the metal catalyst is a catalyst including any one or more metals selected from the group consisting of platinum, iridium, palladium and ruthenium, or
a catalyst including an oxide of any one or more metals selected from the group consisting of platinum, iridium, palladium and ruthenium, or
a catalyst including an alloy of at least two metals selected from the group consisting of platinum, iridium, palladium and ruthenium.

10. A method for manufacturing an electrode for a fuel cell, the method comprising:
a mixing step of producing a first mixed solution by mixing a metal catalyst, a binder and a first dispersion solvent;
a drying step of producing a first mixed solution dried body by drying the first mixed solution;
a second mixed solution production step of producing a second mixed solution by dissolving the first mixed solution dried body in a second dispersion solvent; and
a release paper coating step of producing an electrode by coating the second mixed solution onto a release paper, and then drying the second mixed solution,
wherein a radical scavenger is introduced in the mixing step of producing the first mixed solution and the step of producing the second mixed solution, a partial aliquot in the total amount of the radical scavenger is introduced during the production of the first mixed solution, and another aliquot is introduced in the second mixed solution production step.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Son Dae-Yong
• Cho Yoon-Hwan
• Choi Jin Seong
• Kim Young-Taek

Classifications

• H01M4/8663 Primary

  Selection of inactive substances as ingredients for catalytic active masses, e.g. binders, fillers · CPC title

• H01M4/9083

  on carbon or graphite · CPC title

• H01M4/8882

  Heat treatment, e.g. drying, baking · CPC title

• H01M4/8814 Primary

  Temporary supports, e.g. decal · CPC title

• H01M4/9041

  Metals or alloys (H01M4/92 takes precedence) · CPC title