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

A technology of free radicals and scavengers, used in fuel cells, electrical components, battery electrodes, etc., can solve the problems of reducing the ionic conductivity of ion exchange membranes, reducing the output performance of fuel cells, etc., to prevent chemical degradation and achieve excellent long-term performance. , The effect of improving chemical durability

Active Publication Date: 2020-05-15
KOLON IND INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, radical scavengers reduce the ionic conductivity of the ion exchange membrane, thereby reducing the output performance of the fuel cell

Method used

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

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preparation example Construction

[0062] The preparation method of a free radical scavenger according to another embodiment of the present disclosure includes the step of coating a carbon precursor on the surface of a core particle capable of decomposing peroxides or free radicals, the core particle being selected from transition Any one of metal, noble metal, transition metal or noble metal ion, transition metal or noble metal salt, transition metal or noble metal oxide, and mixtures thereof; and carbonizing the carbon precursor on the surface of the core particle to A step of forming a porous carbon coating.

[0063] The descriptions of the particles capable of decomposing peroxides or radicals and the porous carbon coating are the same as those described above, and thus repeated descriptions thereof will be omitted.

[0064] Meanwhile, the step of coating the carbon precursor on the surface of the core particle may specifically include the step of adding the carbon precursor to a solvent to prepare a compos...

preparation Embodiment 1

[0139] [Preparation Example 1: Preparation of Radical Scavenger]

Embodiment 1-1

[0141] Dopamine is added to the tris-hydrochloride buffer solution in order to prepare the composition for coating the carbon precursor, and will be able to decompose peroxide or free radical core particles such as CeO 2 Added to the composition for coating carbon precursor. At this time, the composition for coating the carbon precursor contained 0.3 parts by weight of the carbon precursor based on 100 parts by weight of the core particles.

[0142] The composition for coating the carbon precursor with core particles added thereto was stirred at 250 rpm for 12 hours at 25°C, the carbon precursor was stabilized in a nitrogen atmosphere at 250°C, and the carbon precursor was stabilized at 700°C carbonized in a nitrogen atmosphere to prepare a radical scavenger having a porous carbon coating formed on the surface of the core particle.

[0143] In the prepared free radical scavenger, the thickness of the porous carbon coating is 2nm to 5nm.

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Abstract

The present invention relates to a radical scavenger, a manufacturing method therefor, a membrane-electrode assembly comprising the same, and a fuel cell comprising the same. The membrane-electrode assembly comprises: 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 fromthe 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. The membrane-electrode assembly can improve chemical durability of the ion exchange membrane, minimize the loss of ion conductivity of the ion exchange membrane itself, prevent the chemical deterioration of the ion exchange membrane occurring during long-term operation of the fuel cell, ensure excellent long-term performance, and be used for general purposes regardless of the kind of ion exchange membrane, such as a fluorine-based ion exchange membrane or a hydrocarbon-based ion exchange membrane.

Description

technical field [0001] The present disclosure relates to a free radical scavenger, a preparation method thereof, a membrane-electrode assembly including the free radical scavenger and a fuel cell including the membrane-electrode assembly, and more particularly, to a free radical scavenger, Preparation method thereof, membrane-electrode assembly comprising said radical scavenger capable of minimizing loss of ion conductivity of ion exchange membrane while improving ionic conductivity, and fuel cell comprising said membrane-electrode assembly The chemical durability of the exchange membrane prevents the chemical degradation of the ion exchange membrane during the long-term operation of the fuel cell, ensures the excellent long-term performance of the ion-exchange membrane, and is compatible with the type of ion-exchange membrane such as fluorine-based ion-exchange membrane Or the hydrocarbon ion exchange membrane has nothing to do, can be universal. Background technique [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/90H01M8/1004B01J23/10H01M8/1018
CPCB01J23/10Y02E60/50H01M4/8647H01M4/88H01M4/9075H01M4/9008H01M2008/1095H01M4/8657H01M4/8663H01M4/9041H01M8/1004H01M8/1018
Inventor 金埈永李武锡金熙卓陸成敏李东县
Owner KOLON IND INC
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