KR102044875B1 - Catalyst layer including radical scavenger for polymer electrolyte membrane fuel cell - Google Patents

Abstract

The present invention relates to an electrode for a polymer electrolyte membrane fuel cell (PEMFC) and a manufacturing method thereof. The electrode for the PEMFC comprises radical scavengers including metal oxides and carbon nanofibers, and a carbon-based support where metal particles are dispersed.

Description

Electrode for polymer fuel cell containing radical scavenger {CATALYST LAYER INCLUDING RADICAL SCAVENGER FOR POLYMER ELECTROLYTE MEMBRANE FUEL CELL}

The present invention relates to an electrode for a polymer electrolyte membrane fuel cell and a manufacturing method thereof.

Fuel cells with high efficiency and clean energy are alternative energy sources that can solve both energy and environmental problems at the same time. In particular, polymer electrolyte membrane fuel cells (PEMFCs), which are suitable for both transport and stationary use, have high efficiency using solid polymer membranes at relatively low operating temperatures.

Polymer Electrolyte Membrane Fuel Cells are more efficient than other types of fuel cells, have higher current density and power density, shorter start-up time, faster response to load changes, and especially It is less susceptible to pressure changes and can produce a wide range of outputs. Therefore, it can be applied to various fields such as a power source of a pollution-free vehicle, a self-generating power source, a mobile power source, and a military power source.

A polymer electrolyte fuel cell is a device that generates electricity by electrochemically reacting hydrogen and oxygen to generate water. The supplied hydrogen is separated into hydrogen ions and electrons in a catalyst of a cathode electrode, and the separated hydrogen ions are transferred through an electrolyte membrane. The oxygen is supplied to the anode, and the oxygen supplied to the anode combines with electrons entering the anode through an external conductor to generate water while generating water.

The obstacles to commercialize PEMFC are high price and short life. Higher prices can be expected to be saved by moving to mass production in the commercialization stage. 40,000 hours of stationary PEMFC and 5,000 hours of transportation PEMFC are required, but there is still a problem of short life despite the low temperature operating conditions. In particular, PEMFC, which is used for transportation, has a shorter service life due to frequent ON / OFF repetition and poor operating conditions such as cold start and vibration. Although the cause of deterioration of life is present in all the components of PEMFC, deterioration of the polymer electrolyte membrane, which is the core element of PEMFC, has a great effect on PEMFC performance after long time operation.

As a result of the main research to prevent the deterioration of the polymer electrolyte membrane, there was not much research on the polymer membrane deterioration until the late 1990s, but in 1990, Scherer et al. Proved the GE mechanism by analyzing the hydrogen peroxide in the GE mechanism in the PEMFC condensate. Baldwin et al. Obtained a relationship between fluorine loss rate and cell life for tens of thousands of hours. In 2004, Endoh et al. Indirectly confirmed the generation of oxygen radicals by analyzing carbon radicals under PEMFC operating conditions.In 2005, Liu et al. Reported the possibility of radical formation directly on Pt without hydrogen peroxide. We have different opinions about the GE mechanism. In 2006, Mittal et al. Reported that hydrogen peroxide was not a major cause of membrane deterioration because hydrogen peroxide was added directly to the cell, resulting in less degradation of the membrane than hydrogen / oxygen supplied cells. In 2007, Ohma et al. Reported that Pt particles in a membrane that had dissolved Pt in the cathode and met with hydrogen deteriorated the membrane.

As described above, research is being actively conducted focusing on the deterioration mechanism of the polymer electrolyte membrane and the method of improving the quality. However, the degradation of the quality may occur depending on the amount of the additive in the preparation of the electrode slurry. There is an urgent need for the development of innovative technologies that can lead to elimination reactions.

The present invention is to solve the above problems, a polymer electrolyte membrane fuel cell (PEEMFC) including a radical scavenger comprising a metal oxide and carbon nanofibers and a carbon-based support in which metal particles are dispersed It is to provide an electrode for).

More specifically, the electrode for the polymer electrolyte membrane fuel cell (PEMFC) has a lower activation energy compared to the cerium oxide which is a conventional additive during the catalytic reaction, and is advantageous in the peroxide (peroxide) removal reaction, It is possible to provide an electrode with improved quality.

However, the problem to be solved by the present invention is not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

An electrode for a polymer electrolyte membrane fuel cell (PEMFC) according to an embodiment of the present invention includes a radical scavenger including a metal oxide and carbon nanofibers and a carbon-based support in which metal particles are dispersed. do.

According to one embodiment of the present invention, the metal oxide may be dispersed on the surface of the carbon nanofibers in the form of particles.

According to an embodiment of the present invention, the carbon nanofibers may include one or more selected from the group consisting of carbon nanotubes, carbon nanofibers, carbon nanowires, carbon nanohorns, and carbon nanorings.

According to an embodiment of the present invention, the metal oxide may be 30 wt% to 50 wt% of the radical scavenger.

According to an embodiment of the present invention, the metal oxide may be cerium-zirconium (CeZrO ₂ ) oxide, and the particle size of the metal oxide may be 2 nm to 4 nm.

According to one embodiment of the present invention, the zirconium of cerium-zirconium (CeZrO ₂ ) oxide may be a catalyst for lowering the activation energy (Ea) in the redox coupling reaction of cerium (Ce) ions.

According to another embodiment of the present invention, a method of preparing a polymer electrolyte membrane fuel cell (PEMFC) unit cell includes an anode, a cathode and an ionomer, and the anode or cathode Includes an electrode for a polymer electrolyte membrane fuel cell (PEMFC) prepared according to one embodiment described above.

According to another exemplary embodiment of the present invention, a method of manufacturing an electrode for a polymer electrolyte membrane fuel cell (PEMFC) may include preparing a radical scavenger; Adding to the slurry composition comprising the system electrode material and applying or spinning the slurry composition to form an electrode.

According to an embodiment of the present invention, the preparing of the radical scavenger may include dispersing the metal oxide precursor and the carbon nanofibers in an organic solvent, after the dispersing, the metal oxide precursor dispersed in the organic solvent and Sonicating the carbon nanofibers, heating and cooling the metal oxide precursor and the carbon nanofibers dispersed in the organic solvent subjected to the sonication step, to the organic solvent subjected to the heating and cooling step It may include the step of mixing by adding a ketone solvent to the dispersed metal oxide precursor and carbon nanofibers.

According to one embodiment of the present invention, the precursor of the metal oxide may include a zirconium acetylacetonate hydrate (Zirconium acetylacetonate hydrate) and cerium acetate hydrate (Cerium acetate hydrate).

According to one embodiment of the invention, in the step of adding the radical scavenger to the slurry composition, the radical scavenger may be from 1% to 5% by weight of the slurry composition.

According to an embodiment of the present invention, the organic solvent may include an amine solvent and prevent oxidation of the radical scavenger.

According to one embodiment of the invention, the ketone solvent may be one containing acetone, methyl ethyl ketone or methyl isobutyl ketone.

According to one embodiment of the invention, the addition capacity of the ketone solvent may be 5 to 20 times the capacity of the organic solvent.

The present invention can provide an electrode for a polymer electrolyte membrane fuel cell (PEMFC) comprising a radical scavenger comprising a metal oxide and carbon nanofibers and a carbon-based support in which metal particles are dispersed. .

More specifically, by adding a small amount of carbon nanotubes containing CeZr nanoparticles to the electrode layer can increase the chemical durability without a significant change in the structure of the electrode layer, it is possible to manufacture only by adding a small amount in the production of electrode slurry, the existing electrode By using the manufacturing process as it is, it is possible to provide a high quality polymer electrolyte membrane fuel cell with economical efficiency.

1 is a synthesis process of a radical scavenger prepared according to an embodiment of the present invention.
Figure 2 is to confirm the content of CeZr in the radical scavenger formed on the carbon nanofibers prepared according to an embodiment of the present invention.
Figure 3 is an elemental analysis of the radical scavengers formed on the carbon nanofibers prepared according to an embodiment of the present invention.
Figure 4 is a TEM image confirming the CeZr form of the radical scavenger formed on the carbon nanofibers prepared according to an embodiment of the present invention and the size of the single nanoparticles.
Figure 5 is a graph measuring the degradation rate of the polymer electrolyte membrane fuel cell electrode prepared according to an embodiment of the present invention and the general electrode prepared according to the comparative example.
Figure 6 is a result of measuring the cell voltage value and HFR as a chemical durability evaluation using a general electrode prepared according to a comparative example.
7 is a result of measuring the cell voltage value and the HFR as a chemical durability evaluation using the electrode for a polymer electrolyte membrane fuel cell manufactured according to an embodiment of the present invention.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. However, various changes may be made to the embodiments so that the scope of the patent application is not limited or limited by these embodiments. It is to be understood that all changes, equivalents, and substitutes for the embodiments are included in the scope of rights.

The terminology used herein is for the purpose of description and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

In addition, in the description with reference to the accompanying drawings, the same components regardless of reference numerals will be given the same reference numerals and duplicate description thereof will be omitted. In the following description of the embodiment, when it is determined that the detailed description of the related known technology may unnecessarily obscure the gist of the embodiment, the detailed description thereof will be omitted.

When an element or layer is represented as "on", "connected to" or "coupled to" another element or layer, this is directly another element or layer. It may be understood that the layers may be present, connected or combined, or there may be intervening elements and layers.

Hereinafter, an electrode for a polymer electrolyte membrane fuel cell (PEMFC) of the present invention and a manufacturing method thereof will be described in detail with reference to Examples and drawings. However, the present invention is not limited to these embodiments and drawings.

An electrode for a polymer electrolyte membrane fuel cell (PEMFC) according to an embodiment of the present invention includes a radical scavenger including a metal oxide and carbon nanofibers and a carbon-based support in which metal particles are dispersed. do.

According to one side, the polymer electrolyte membrane fuel cell (PEMFC) is an electrochemical reaction of the protons generated by the oxidation of hydrogen at the cathode side through the polymer electrolyte membrane to react with the reduced oxygen ions at the anode side It means a battery that generates electricity and water through the reaction.

According to one side, the electrolyte membrane of the polymer electrolyte membrane fuel cell (PEMFC), the core component constituting the fuel cell may use Nafion, a perfluorinated electrolyte membrane, the perfluorinated electrolyte membrane It can have high ion conductivity and good mechanical strength.

According to one side, the electrolyte membrane of the polymer electrolyte membrane fuel cell (PEMFC) may include an electrolyte composite membrane in which cerium ions are introduced to improve oxidation stability.

According to one side, when the cerium ion is doped into the Nafion membrane, it is possible to secure the durability of the polymer electrolyte membrane by improving the oxidation stability at low humidity, and to introduce the cerium oxide ceria into the membrane-electrode assembly Radicals can be suppressed.

According to one side, the radical scavenger may mean a radical inhibitor produced by an electrochemical reaction which is considered to be the main cause of the degradation of the polymer electrolyte membrane fuel cell.

According to one side, the radical is generated by a two-electron reaction in the oxygen reduction reaction of the catalyst, even if it is not necessarily a catalyst to react with a metal object such as a reactor pipe, water and oxygen to produce OH ·, OOH · Because these radicals react very fast, they react chemically with not only hydrogen or oxygen, but also carbon, which is used as a catalyst support, polymers that are used as electrolytes, and catalysts. Can be.

According to one side, the radical scavenger in the present invention may comprise ceria in particular in the ceramic, the ceria (Cerium Oxide) is an active factor to the radical because it is free to move to Ce ⁺² and Ce ⁺³ React with to remove radicals.

According to one embodiment of the present invention, the metal oxide may be dispersed on the surface of the carbon nanofibers in the form of particles.

According to one side, the form of the metal oxide dispersed in the surface of the carbon nanofibers in the form of particles may be dispersed by electrospinning, a mixture of metal oxides and carbon nanofibers mixed, on the surface of the carbon nanofibers It may include a form coated on or both forms.

According to an embodiment of the present invention, the carbon nanofibers may include one or more selected from the group consisting of carbon nanotubes, carbon nanofibers, carbon nanowires, carbon nanohorns, and carbon nanorings.

According to one side, the carbon nanofibers may be to reinforce the mechanical strength of the electrolyte membrane, and to sufficiently maintain the thickness of the membrane even after using the battery for a long time.

According to one side, the carbon nanofibers can be used without limitation if the mechanical properties are the same regardless of the type, for example, carbon nanotubes, carbon nanofibers, carbon nanowires, carbon nanohorn, carbon nano ring It may include one or more selected from the group consisting of, preferably the straightness in the longitudinal direction of each carbon nanofibers may be good.

According to one side, the diameter of the carbon nanofibers may be 5 to 100nm.

According to one side, if the diameter is 5nm or less, it is difficult to disperse, there is a problem that the slurry may be uneven due to agglomeration after dispersing, if the diameter is 100nm or more decreases the ability to bind and physical damage There may be.

According to an embodiment of the present invention, the metal oxide may be 30 wt% to 50 wt% of the radical scavenger.

According to one side, when the weight of the metal oxide is less than 30% by weight of the entire radical scavenger including the metal oxide and carbon nanofibers, the role as a radical scavenger is insignificant, if the weight exceeds 50% by weight This can lead to a reduction in fuel cell performance, such as obstructing mass transfer and preventing the flow of reactant gases.

According to an embodiment of the present invention, the metal oxide may be cerium-zirconium (CeZrO ₂ ) oxide, and the particle size of the metal oxide may be 2 nm to 4 nm.

According to one side, the cerium-zirconium (CeZrO ₂ ) oxide may act as a radical inhibitor to inhibit radicals.

According to one side, by dispersing the cerium-zirconium (CeZrO ₂ ) oxide together with carbon nanofibers, the hydrogen peroxide generated in each electrode is decomposed into water molecules to suppress radical formation, and eventually It can bring about the effect of suppressing decomposition.

According to one side, in order to apply the cerium-zirconium (CeZrO ₂ ) oxide to the fuel cell can be prepared with an average of 2 nm to 60 nm nanoparticles, while suppressing radicals and at the same time the chemical stability of the electrode and polymer membrane Although it can be improved, since the operating conditions of the fuel cell are severe at high temperatures, high potentials, etc., there is a problem that the durability of the nanoparticles is considerably inferior.

According to one side, since the operating conditions of the fuel cell are severe at high temperatures, high potentials, and the like, the cerium is replaced with a zirconium compound to physically stabilize the nanoparticles. It may be better to use a composite.

According to one side, in the case of cerium-zirconium (CeZrO ₂ ) oxide synthesized with a compound of cerium and zirconium as described above, the thermal stability of cerium nanoparticles is greatly improved by synthesizing cerium with a compound of zirconium, so even under harsh conditions Deformation and aggregation of particles can be reduced.

According to one embodiment of the present invention, the zirconium of cerium-zirconium (CeZrO ₂ ) oxide may be a catalyst for lowering the activation energy (Ea) in the redox coupling reaction of cerium (Ce) ions.

According to one side, Nafion ionomer in the polymer fuel cell is destroyed by Hydroxyl or Hydro-peroxyl radicals species, which can lead to reduced performance. Therefore, cerium, which can reduce Hydroxyl or Hydro-peroxyl radical, is added to chemical In this case, cerium (Ce) is ionized to cause redox couple and the mobility of the catalyst may be stabilized by adding Zr.

According to one side, the redox coupling reaction of the cerium ions is the same as Scheme 1 to Scheme 3 below.

<Scheme 1>

Ce ³⁺ + HO + H ⁺ -> Ce ⁴⁺ + H ₂ O

<Scheme 2>

Ce ⁴⁺ + H ₂ O _2- > HOO + H ⁺

<Scheme 3>

Ce ⁴⁺ + HOO-> Ce ³⁺ + O ₂ + H ⁺

According to one side, the hydro-peroxyl radicals unzipping Nafion chain can be structural breakdown.

According to one side, lanthanide has two oxidation states, and Ce ³⁺ can remove the hydroxyl radical (HO.).

According to one side, CeO ₂ acts as Ce ⁴⁺ and can transmit and receive electrons in the form of a redox couple.

According to one side, the zirconium of the cerium-zirconium (CeZrO ₂ ) oxide serves as a catalyst for lowering the activation energy (Ea) in the redox coupling reaction of cerium (Ce) ions, to remove peroxide (peroxide) May be advantageous.

According to one side, due to the cerium-zirconium (CeZrO ₂ ) oxide, before the hydroxyl or Hydro-peroxyl radicals species and the ionomer meet, there may be an effect to be decomposed by the nano-size CeZr particles.

According to another embodiment of the present invention, a method of preparing a polymer electrolyte membrane fuel cell (PEMFC) unit cell includes an anode, a cathode and an ionomer, and the anode or cathode Includes an electrode for a polymer electrolyte membrane fuel cell (PEMFC) prepared according to one embodiment described above.

According to another exemplary embodiment of the present invention, a method of manufacturing an electrode for a polymer electrolyte membrane fuel cell (PEMFC) may include preparing a radical scavenger; Adding to the slurry composition comprising the system electrode material and applying or spinning the slurry composition to form an electrode.

According to an embodiment of the present invention, the preparing of the radical scavenger may include dispersing the metal oxide precursor and the carbon nanofibers in an organic solvent, after the dispersing, the metal oxide precursor dispersed in the organic solvent and Sonicating the carbon nanofibers, heating and cooling the metal oxide precursor and the carbon nanofibers dispersed in the organic solvent subjected to the sonication step, to the organic solvent subjected to the heating and cooling step It may include the step of mixing by adding a ketone solvent to the dispersed metal oxide precursor and carbon nanofibers.

According to one side, the sonication step, may be preferably performed for 10 to 20 minutes at 20 ℃.

According to one side, the heating is not too high temperature, it may be about 70 ℃ to 90 ℃, preferably about 80 ℃ by gradually heating about 2 ℃ by 1 minute to about 1 to 36 hours of heating.

According to one side, the cooling may be cooling at room temperature in order to make the metal precursor well dispersed on the carbon nanofibers.

According to one embodiment of the present invention, the precursor of the metal oxide may include a zirconium acetylacetonate hydrate (Zirconium acetylacetonate hydrate) and cerium acetate hydrate (Cerium acetate hydrate).

According to one side, the result can be synthesized in various ways by the injection ratio of the precursor of the metal oxide, the result of each having a different composition may also have different effects.

According to one side, as the precursor, the composition ratio of zirconium acetylacetonate hydrate (Zirconium acetylacetonate hydrate), cerium acetate hydrate (Cerium acetate hydrate) and carbon nanofibers, preferably may be 0.25: 0.225: 0.2. .

According to one embodiment of the invention, in the step of adding the radical scavenger to the slurry composition, the radical scavenger may be from 1% to 5% by weight of the slurry composition.

According to one side, when the radical scavenger is less than 1% by weight in the slurry composition, the radical inhibitory effect may be insignificant, and when the radical scavenger is greater than 5% by weight, the mass transfer may be interrupted to prevent the inflow and outflow of the reaction gas. This can lead to reduced fuel cell performance.

According to one side, the radical scavenger may most preferably be 3% by weight of the slurry composition.

According to an embodiment of the present invention, the organic solvent may include an amine solvent and prevent oxidation of the radical scavenger.

According to one side, the organic solvent, including an amine solvent, preferably may be oleylamine (Oleylamine).

According to one side, the oleylamine may be a high-solubility solvent to increase the dispersibility and improve the surface stability in metal precursors and other organic solvents, and acts as a capping agent, oxygen is approaching the metal NPs It is possible to impart stability to prevent oxidation.

According to one side, the oleylamine can reduce the metal precursor to form the metal nanoparticles, while wrapping around the formed nanoparticles to improve dispersibility.

According to one side, after dispersing the metal precursor in the oleylamine, it can be easily dissolved using ethyl alcohol (EtOH), ethyl ether, acetone (acetone) and other organic solvent during the removal process have.

According to one embodiment of the invention, the ketone solvent may be one containing acetone, methyl ethyl ketone or methyl isobutyl ketone.

According to one side, the ketone solvent, preferably may be acetone, it may be to add 100 mL to 200 mL.

According to one side, in order to disperse the cerium-zirconium (CeZrO ₂ ) oxide on the carbon nanofibers, for example, carbon nanotubes after adding the ketone solvent, 1 hour to 5 hours, preferably You can stir at 500 rpm for about 3 hours.

According to one side, the mixture may be dried at least five times for 30 minutes with 100 mL to 200 mL of a ketone solvent, followed by drying.

According to one side, the washing may proceed after fractionation by particle size at 700 rpm to remove impurities.

According to one embodiment of the invention, the addition capacity of the ketone solvent may be 5 to 20 times the capacity of the organic solvent.

According to one side, the organic solvent, as a solvent in the process of mixing the carbon nanofibers and the metal oxide precursor, 10 mL to 20 mL, preferably 15 mL may be used for dispersibility and surface stability.

According to one side, the ketone solvent, as an additive for washing or separating the metal oxide precursor synthesized on the organic solvent, may be added 5 times to 20 times the capacity of the organic solvent, preferably 150 mL Can be added.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

However, the following examples are only for illustrating the present invention, and the contents of the present invention are not limited to the following examples.

Example 1. Synthesis of CeZr NPs

To 15 mL of oleylamine, 0.25 g of zirconium acetylacetonate hydrate, 0.25 g of cerium acetate hydrate, and 0.2 g of carbon nanotubes were added.

Thereafter, the solution was sonicated at 20 ° C. for about 15 minutes, and gradually heated to 2 ° C. per minute to reach 80 ° C., and then left at 80 ° C. for one day.

After cooling the compound reacted at high temperature for one day until reaching room temperature, 150 mL of acetone was added and then stirred at 500 rpm for 3 hours.

Subsequently, CeZr NPs were synthesized by washing five times or more with 150 mL of acetone at 700 rpm and 30 minutes.

Example 2. Fabrication of Electrode with CeZr NPs

The slurry composition to which the CeZr NPs prepared according to Example 1 was added to the slurry composition was spun to form an electrode.

Comparative example

An electrode was prepared in the same manner as in Example 2, but a general Pt / C electrode without CeZr NPs added to the slurry composition was used.

2 is a graph confirming the CeZr content in the carbon nanotubes in the CeZr NPs obtained according to Example 1, and as a result, it was confirmed that CeZr is present in about 39.4% by weight of the composite mass.

3 is a mapping image confirming the presence of carbon, cerium, zirconium and oxygen in CeZr NPs through the CeZr NPs element analysis obtained in Example 1 above.

4 is a TEM image of the CeZr NPs obtained according to Example 1 to confirm the size of the nanoparticles, and it was confirmed that the nanoparticles had an appropriate nanoparticle size as a radical scavenger.

FIG. 5 shows that the electrode prepared according to Example 2 and Comparative Example was maintained at an initial OCV (0.945 V) for 100 hours, and then the degradetion rate was confirmed. The electrode was reduced by about 5.9%, and it was confirmed that the degradation phenomenon was remarkably improved.

6 and 7, T _cell 70 ° C, ζa / ζ 1.5 / 2, Pa, Pc Ambient and RHa / RHc 100 / to confirm the chemical durability of the electrode prepared according to Example 2 and Comparative Example Cell voltage and HFR were measured under 100 conditions.

As a result, referring to FIG. 7, it was confirmed that the voltage holding OCV for 100 hours was not different from that of BOL, so that the durability was improved compared to the electrode manufactured only with general Pt / C according to the comparative example.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is represented by the following claims, and it should be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the present invention.

Claims (14)

Radical scavengers including metal oxides and carbon nanofibers; And
A carbon-based support in which metal particles are dispersed;
Including,
The metal oxide is 30% by weight to 50% by weight of the radical scavenger,
Particle size of the metal oxide is 2 nm to 4 nm,
The radical scavenger is that the metal oxide is dispersed on the carbon nanofiber surface by electrospinning,
Electrode for polymer electrolyte membrane fuel cell (PEMFC).
The method of claim 1,
The metal oxide is,
It is dispersed in the carbon nanofiber surface in the form of particles,
Electrode for polymer electrolyte membrane fuel cell (PEMFC).
Claim 3 has been abandoned upon payment of a set-up fee. The method of claim 1,
The carbon nano fiber,
Carbon nanotubes, carbon nanofibers, carbon nanowires, carbon nanohorn, carbon nano ring containing one or more selected from the group consisting of,
Electrode for polymer electrolyte membrane fuel cell (PEMFC).
delete The method of claim 1.
The metal oxide is,
What is cerium-zirconium (CeZrO2) oxide,
Electrode for polymer electrolyte membrane fuel cell (PEMFC).
The method of claim 5,
Zirconium of the cerium-zirconium (CeZrO 2) oxide,
It is a catalyst for lowering the activation energy (Ea) in the redox coupling reaction of cerium (Ce) ions,
Electrode for polymer electrolyte membrane fuel cell (PEMFC).
Anode;
Cathode; And
Ionomers;
Including,
The anode or cathode,
It is prepared according to any one of claims 1 to 3, 5 and 6,
Polymer electrolyte membrane fuel cell (PEMFC) unit cell.
Radical scavengers including metal oxides and carbon nanofibers; And
A carbon-based support in which metal particles are dispersed;
Including,
The metal oxide is 30% by weight to 50% by weight of the radical scavenger,
Particle size of the metal oxide is 2 nm to 4 nm,
The radical scavenger is the metal oxide is dispersed on the surface of the carbon nanofibers by electrospinning,
Preparing a radical scavenger;
Adding the radical scavenger to a slurry composition comprising a carbon-based electrode material; And
Applying or spinning the slurry composition to form an electrode;
Including,
Method for producing an electrode for a polymer electrolyte membrane fuel cell (PEMFC).
The method of claim 8,
Preparing the radical scavenger,
Dispersing a metal oxide precursor and carbon nanofibers in an organic solvent;
After the dispersing, ultrasonicating the metal oxide precursor and the carbon nanofibers dispersed in the organic solvent;
Heating and cooling the metal oxide precursor and the carbon nanofibers dispersed in the organic solvent subjected to the ultrasonication; And
Adding and mixing a ketone solvent to the metal oxide precursor and the carbon nanofibers dispersed in the organic solvent subjected to the heating and cooling steps;
To include,
Method for producing an electrode for a polymer electrolyte membrane fuel cell (PEMFC).
The method of claim 9,
The precursor of the metal oxide,
That includes zirconium acetylacetonate hydrate (Zirconium acetylacetonate hydrate) and cerium acetate hydrate,
Method for producing an electrode for a polymer electrolyte membrane fuel cell (PEMFC).
Claim 11 was abandoned upon payment of a set-up fee. The method of claim 8,
Adding the radical scavenger to the slurry composition,
Wherein the radical scavenger is from 1% to 5% by weight of the slurry composition,
Method for producing an electrode for a polymer electrolyte membrane fuel cell (PEMFC).
The method of claim 9,
The organic solvent,
An amine solvent,
To prevent the oxidation of radical scavengers,
Method for producing an electrode for a polymer electrolyte membrane fuel cell (PEMFC).
Claim 13 was abandoned upon payment of a set-up fee. The method of claim 9,
The ketone solvent,
One containing acetone, methyl ethyl ketone or methyl isobutyl ketone,
Method for producing an electrode for a polymer electrolyte membrane fuel cell (PEMFC).
Claim 14 was abandoned upon payment of a set-up fee. The method of claim 9,
The addition capacity of the ketone solvent,
5 to 20 times the capacity of the organic solvent,
Method for producing an electrode for a polymer electrolyte membrane fuel cell (PEMFC).

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