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Fuel cell manufacturing method for controlling antioxidant position

An antioxidant, fuel cell technology, applied in fuel cells, fuel cell components, power system fuel cells, etc., can solve the problems of reduced conductivity, deterioration of transfer, and increased incidence.

Pending Publication Date: 2022-06-21
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem of reduced conductivity and thus increased ohmic losses
In addition, when only the absolute amount of the antioxidant is increased, there is a problem that when the process of transferring the cathode / anode electrodes is performed, transferability is deteriorated due to changes in surface characteristics, so that the occurrence rate of defects may sharply increase

Method used

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  • Fuel cell manufacturing method for controlling antioxidant position
  • Fuel cell manufacturing method for controlling antioxidant position
  • Fuel cell manufacturing method for controlling antioxidant position

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0051] The preparation step ( S10 ) of the three-layer MEA with the sub-gasket joined includes the following processes: preparing a three-layer MEA including a cathode on one surface of an electrolyte membrane and an anode on the other surface of the electrolyte membrane, and then placing an air Subgaskets for the inlet and hydrogen inlet are bonded to the sides of the three-layer MEA.

[0052] The electrolyte membrane according to the present invention may be a conventional electrolyte membrane (eg, a perfluorosulfonic acid-based compound and a fluorine-based polymer compound having a sulfonic acid group at an end group) that can be used in the present invention. Preferably, the electrolyte membrane may be Nafion and polytetrafluoroethylene (PTFE) based polymers (which are polymers having MSC, LSC and SSC based side chains in the Teflon backbone), but the electrolyte membrane is not limited to containing specific components.

[0053] The cathode on one surface of the electrol...

Embodiment approach

[0070] According to various exemplary embodiments of the present invention, especially since the method includes moving antioxidants derived from antioxidant precursors to the electrolyte membrane, there is an advantage that no additional operations are required to control antioxidants during manufacturing operations. position of the oxidizing agent, so that the efficiency of the process can be improved, and the antioxidant can be selectively and concentratedly placed only in the position where deterioration often occurs in the electrolyte membrane at a high concentration, so there is an excellent economical feasibility due to cost reduction. advantage. In addition, since the position control can be performed in the ionic state rather than the oxide type, a radical scavenger is possible, and there is an advantage that the oxidation prevention efficiency is high.

[0071] The fuel cell

[0072] Fuel cells can be fabricated according to the methods described herein. In this ...

Embodiment 1-1 to 1-5

[0076] Examples 1-1 to 1-5: Fabrication of fuel cells satisfying current and other conditions

[0077] (S10): An ionomer with an equivalent weight of 735 (W.L. Gore & Associates GmbH) was prepared as an electrolyte membrane. In addition, preparations with thickness ranging from 7 μm to 8 μm and containing Pt / C catalyst, ionomer and antioxidant Ce(NO 3 ) 3 ·6H 2 The O electrode was used as the cathode, prepared with a thickness ranging from 1 μm to 2 μm and containing Pt / C catalyst, IrO 2 , ionomer and antioxidant Ce(NO 3 ) 3 ·6H 2 O was used as the anode, and the cathode and the anode were provided on one surface and the other surface of the electrolyte membrane, thereby preparing a three-layer MEA. Then, subgaskets equipped with air inlets and hydrogen inlets were provided on edge regions of the sides of the three-layer MEA to seal the side ends of the three-layer MEA.

[0078] (S20): By incorporating CeO 2 A five-layer MEA was fabricated by stacking the gas diffusi...

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Abstract

A method of manufacturing a fuel cell and a fuel cell manufactured according to the method. The method may include: bonding a sub-gasket provided with an air inlet and a hydrogen inlet to a side of a three-layer membrane electrode assembly (MEA) including an electrolyte membrane, a cathode on one surface of the electrolyte membrane, and an anode on another surface of the electrolyte membrane; laminating a gas diffusion layer comprising an antioxidant precursor on the cathode and the anode, and preparing a five-layer MEA; and applying an electrical current to the five-layer MEA and moving the antioxidant derived from the antioxidant precursor to the electrolyte membrane.

Description

technical field [0001] The present invention relates to a method of manufacturing a fuel cell that locally migrates metal ions contained in an antioxidant to a region of an electrolyte membrane where a large amount of chemical degradation exists, and a fuel cell manufactured according to the method. Background technique [0002] Generally, a polymer electrolyte membrane fuel cell (PEMFC) is applied as a fuel cell for a vehicle. In order for the PEMFC to exhibit a normal high output performance with at least several tens of kW under various driving conditions of the vehicle, the PEMFC should be able to work stably in a wide range of current intensity. [0003] The reactions used to generate electricity in a PEMFC take place in a membrane electrode assembly (MEA) formed from a perfluorosulfonic acid ionomer-based membrane and electrodes for the anode and cathode. The hydrogen supplied to the anode (the oxide electrode of the PEMFC) is separated into hydrogen ions (protons) an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0245H01M8/1004H01M8/10
CPCH01M8/0245H01M8/1004H01M8/10H01M2008/1095H01M2250/20H01M8/1086H01M8/1051H01M8/1007H01M8/0286H01M8/0276Y02P70/50Y02E60/50H01M8/0273
Inventor 李珠熙
Owner HYUNDAI MOTOR CO LTD