Radical scavenger, manufacturing method therefor, membrane-electrode assembly comprising same, and fuel cell comprising same

Patent metadata

Field	Value
Publication number	US-2020280074-A1
Application number	US-201816647545-A
Country	US
Kind code	A1
Filing date	Sep 28, 2018
Priority date	Sep 29, 2017
Publication date	Sep 3, 2020
Grant date	—

Abstract

A radical scavenger, a manufacturing method therefor, a membrane-electrode assembly including the radical scavenger, and a fuel cell including the membrane-electrode assembly are disclosed. The membrane-electrode assembly contains an ion exchange membrane; catalyst electrodes disposed on both surfaces of the ion exchange membrane, respectively; and a radical scavenger disposed at any one position selected from the group consisting of in the catalyst electrodes, in the ion exchange membrane, between the ion exchange membrane and the catalyst electrodes, and a combination thereof.

First claim

1 . A radical scavenger comprising:
a core particle capable of decomposing a peroxide or a radical, the core particle being any one selected from a group consisting of a transition metal, a noble metal, an ion thereof, a salt thereof, an oxide thereof, and a mixture thereof; and a porous carbon coating layer located on a surface of the core particle.

2 . The radical scavenger according to claim 1 , wherein the porous carbon coating layer has a pore size of 1 angstrom (Å) to 20 angstrom (Å).

3 . The radical scavenger according to claim 1 , wherein the porous carbon coating layer has a thickness of 0.5 nm to 10 nm.

4 . The radical scavenger according to claim 1 , wherein
the transition metal is any one selected from a group consisting of cerium (Ce), nickel (Ni), tungsten (W), cobalt (Co), chromium (Cr), zirconium (Zr), yttrium (Y), manganese (Mn), iron (Fe), titanium (Ti), vanadium (V), iridium (Ir), molybdenum (Mo), lanthanum (La), and neodymium (Nd), and the noble metal is any one selected from a group consisting of silver (Au), platinum (Pt), ruthenium (Ru), palladium (Pd), and rhodium (Rh).

5 . The radical scavenger according to claim 1 , wherein the ion of the transition metal or the noble metal is any one selected from a group consisting of a cerium ion, a nickel ion, a tungsten ion, a cobalt ion, a chromium ion, a zirconium ion, an yttrium ion, a manganese ion, an iron ion, a titanium ion, a vanadium ion, an iridium ion, a molybdenum ion, a lanthanum ion, a neodymium ion, a silver ion, a platinum ion, a ruthenium ion, a palladium ion, and a rhodium ion.

6 . The radical scavenger according to claim 1 , wherein the oxide of the transition metal or the noble metal is any one selected from a group consisting of cerium oxide, nickel oxide, tungsten oxide, cobalt oxide, chromium oxide, zirconium oxide, yttrium oxide, manganese oxide, iron oxide, titanium oxide, vanadium oxide, iridium oxide, molybdenum oxide, lanthanum oxide, and neodymium oxide.

7 . The radical scavenger according to claim 1 , wherein the salt of the transition metal or the noble metal is any one selected from a group consisting of carbonate, acetate, chloride salt, fluoride salt, sulfate, phosphate, tungstate, hydrate, ammonium acetate, ammonium sulfate, and acetylacetonate of the transition metal or the noble metal.

8 . A method of manufacturing a radical scavenger, the method comprising:
coating a carbon precursor on a surface of a core particle capable of decomposing a peroxide or a radical, the core particle being any one selected from a group consisting of a transition metal, a noble metal, an ion thereof, a salt thereof, an oxide thereof, and a mixture thereof; and carbonizing the carbon precursor on the surface of the core particle to form a porous carbon coating layer.

9 . The method according to claim 8 , wherein the step of coating the carbon precursor on the surface of the core particle comprises:
adding the carbon precursor to a solvent to manufacture a composition for coating a carbon precursor; and adding and stirring the core particle to the composition for coating the carbon precursor.

10 . The method according to claim 9 , wherein, in the step of coating the carbon precursor on the surface of the core particle, the composition for coating the carbon precursor comprises 0.01 parts by weight to 10 parts by weight of the carbon precursor based on 100 parts by weight of the core particle.

11 . The method according to claim 9 , wherein the carbon precursor is any one selected from a group consisting of dopamine, acrylonitrile, vinylpyrrolidone, lignin, a polymer, and a mixture thereof.

12 . The method according to claim 9 , wherein the step of adding and stirring the core particle to the composition for coating the carbon precursor is performed at 0° C. to 80° C. for 0.5 hours to 50 hours at 100 rpm to 500 rpm.

13 . The method according to claim 8 , wherein carbonization of the carbon precursor comprises:
stabilization performed at a temperature of 100° C. to 400° C. in a nitrogen or argon atmosphere; and carbonization performed at a temperature of 600° C. to 900° C. in a nitrogen or argon atmosphere.

14 . A membrane-electrode assembly comprising:
an ion exchange membrane; catalyst electrodes disposed at opposite surfaces of the ion exchange membrane; and the radical scavenger according to claim 1 , the radical scavenger being located at any one position selected from a group consisting of in the catalyst electrodes, in the ion exchange membrane, between the ion exchange membrane and the catalyst electrodes, and a combination thereof.

15 . The membrane-electrode assembly according to claim 14 , further comprising:
interfacial adhesion layers located between the ion exchange membrane and the catalyst electrodes, wherein each of the interfacial adhesion layers comprises an ionomer and the radical scavenger.

16 . The membrane-electrode assembly according to claim 15 , wherein each of the interfacial adhesion layers comprises 0.1 wt % to 70 wt % of the radical scavenger based on a total weight of each of the interfacial adhesion layers.

17 . The membrane-electrode assembly according to claim 15 , wherein each of the interfacial adhesion layers has a thickness of 10 nm to 10 μm.

18 . The membrane-electrode assembly according to claim 15 , wherein a loading amount of each of the interfacial adhesion layers is 0.01 mg/cm 2 to 2.0 mg/cm 2 .

19 . A fuel cell comprising the membrane-electrode assembly according to claim 14 .

Assignees

• Kolon Inc
• Korea Advanced Inst Sci & Tech

Inventors

• Kim Jun-Young
• Lee Moo-Seok
• Kim Hee-Tak
• Yuk Seongmin
• Lee Dong-Hyun

Classifications

• H01M8/1004

  characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title

• H01M4/8663 Primary

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

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• H01M4/8657 Primary

  layered · CPC title

• H01M4/9041

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