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Polymer electrolyte membrane, a method for fabricating the same, and a membrane-electrode assembly including the same

An electrolyte membrane and polymer technology, applied in solid electrolyte fuel cells, non-aqueous electrolytes, solid electrolytes, etc., can solve the problems of increased resistance loss, decreased energy conversion efficiency, and reduced economic efficiency, achieving excellent adhesion, excellent Adhesiveness, high efficiency effect

Active Publication Date: 2014-12-24
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, fluorine ion conductors are poor in mechanical strength, so there is a problem that, when used for a long time, pinholes are generated, thereby reducing energy conversion efficiency
In order to improve the mechanical strength, it has been attempted to use a fluorine ion conductor with a higher film thickness; however, in this case, there are problems in that the resistance loss increases and the use of expensive materials increases, leading to a decrease in economic efficiency
However, due to their surface properties, hydrocarbon-containing ion conductors cannot be effectively used in printing methods

Method used

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  • Polymer electrolyte membrane, a method for fabricating the same, and a membrane-electrode assembly including the same
  • Polymer electrolyte membrane, a method for fabricating the same, and a membrane-electrode assembly including the same

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preparation example Construction

[0078] A method of producing a polymer electrolyte membrane according to another embodiment of the present invention includes: a step of forming a hydrocarbon-containing ion conductive layer; and a step of discontinuously dispersing a fluorine-containing ion conductor on the hydrocarbon-containing ion conductive layer.

[0079] In one or more exemplary embodiments, the method of manufacturing a polymer electrolyte membrane may include: a step of preparing a porous substrate; a step of filling the pores of the porous substrate with a hydrocarbon-containing ion conductor; a step of forming a hydrocarbon-containing ion-conducting layer on the lower surface; and a step of discontinuously dispersing a fluorine-containing ion-conducting layer on the hydrocarbon-containing ion-conducting layer.

[0080] Hereinafter, a method for producing a polymer electrolyte membrane will be described in the case of a reinforced membrane including a porous substrate, but the method for producing a p...

Embodiment 1

[0108] S-PEEK (sulfonated polyether ether ketone) was dissolved in N-methyl-2-pyrrolidone (NMP), thereby preparing a 10 wt % ion conductor solution. The ion conductor solution was coated on a glass substrate. The coated layer was dried at 50° C. for 24 hours. Then, the coating layer was separated from the glass substrate again, thereby forming a hydrocarbon-containing ion-conductive layer having a thickness of 20 μm.

[0109] A solution for forming a fluorine-containing ion conductor was prepared by adding 5% DMF to an IPA dispersion containing 10% Nafion. The fluorine-containing ion conductor was formed by spraying the solution for forming the fluorine-containing ion conductor onto the surface of the hydrocarbon-containing ion-conducting layer, followed by drying at 80° C. for 10 hours.

[0110] On the other hand, the electrode was prepared by coating the electrode slurry containing Nafion binder on the PI film, and then cut it into 5×5 cm 2 size of. The electrode thus pr...

Embodiment 2

[0112] A membrane electrode assembly was prepared in the same manner as in Example 1, except that the fibrous fluorine-containing ion conductor was discontinuously dispersed in the hydrocarbon-containing on the surface of the ion-conducting layer.

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Abstract

The present invention relates to a polymer electrolyte membrane, a method for fabricating the same, and a membrane-electrode assembly including the same, and provides a polymer electrolyte membrane which includes a hydrocarbon series ion conductive layer, and a fluoride series ion conductive body discontinuously dispersed on the surface of the hydrocarbon series ion conductive layer. The polymer electrolyte membrane has excellent junctional property with an electrode, resulting in excellent adhesive strength, improving the performance of a fuel cell due to reduced interfacial resistance, and having excellent transfer efficiency when being joined with an electrode by using transference.

Description

technical field [0001] The present invention relates to a polymer electrolyte membrane, a method for manufacturing the polymer electrolyte membrane, and a membrane electrode assembly including the polymer electrolyte membrane. More specifically, the present invention relates to a polymer electrolyte membrane which has excellent adhesion to an electrode and thus can improve the performance of a fuel cell by reducing interfacial resistance, and which can It is easily combined with the electrode by transfer with high efficiency. Background technique [0002] Fuel cells are cells that directly convert chemical energy generated by oxidation of fuel into electrical energy, and due to their high energy conversion efficiency and environmentally friendly features of reduced pollutant discharge, fuel cells have attracted attention as next-generation energy sources. [0003] A fuel cell generally has a structure in which an anode and a cathode are formed with an electrolyte membrane i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10C08J5/22C08L27/12
CPCH01M8/102H01M8/106H01M8/1069H01M2008/1095H01M8/1048H01M8/1053H01M2300/0082Y02P70/50Y02E60/50H01M8/1067H01M8/1081
Inventor 李武锡慎镛哲金娜玲李瞳熏
Owner KOLON IND INC
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