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Polymer electrolyte membrane, method for manufacturing same, and membrane electrode assembly comprising same

An electrolyte membrane, polymer technology, applied in electrolytes, non-aqueous electrolytes, solid electrolytes, etc., can solve the problems of low free radical stability, weak free radical resistance, high hydrogen permeability, and achieve excellent durability and ion conductivity. , the effect of reducing hydrogen permeability

Active Publication Date: 2020-07-14
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Polymer electrolyte membranes using fluorine-based polymer materials, which are generally used in fuel cells for transportation, have low stability to radicals, that is, low chemical stability due to weak resistance to radicals generated during operation. shortcoming
In addition, polymer electrolyte membranes have high proton conductivity due to wide proton transport channels, but have the disadvantage of high hydrogen permeability

Method used

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  • Polymer electrolyte membrane, method for manufacturing same, and membrane electrode assembly comprising same
  • Polymer electrolyte membrane, method for manufacturing same, and membrane electrode assembly comprising same
  • Polymer electrolyte membrane, method for manufacturing same, and membrane electrode assembly comprising same

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preparation example Construction

[0198] A method for preparing a polymer electrolyte membrane according to another embodiment of the present disclosure includes: preparing a fluorine-based carrier having a plurality of pores formed by a microstructure of polymer fibrils; Or forming a nanonet on both surfaces, the nanonet including nanofibers integrated with a nonwoven fabric having a plurality of pores, thereby preparing a hybrid composite porous carrier; and filling the pores of the hybrid composite porous carrier with ion conductors.

[0199] Fluorinated polymers with multiple pores due to the microstructure of polymer fibrils were prepared as follows. Specifically, in the presence of a lubricant such as solvent naphtha or white oil, PTFE powder prepared by dispersion polymerization is extruded into a stick paste, and the stick paste extrudate (cake) is rolled to prepare Sintered PTFE sheet. The green PTFE sheet is stretched at a predetermined ratio in the machine direction (MD) and / or the transverse direc...

preparation Embodiment 1

[0250] [Preparation Example 1: Preparation of Ion Conductor]

preparation Embodiment 1-1

[0252] 1) Preparation of hydrophobic repeating units

[0253] As shown in Equation 3 below, bisphenol A was reacted with 1,3-bis(4-fluorobenzoyl)benzene at 160°C to 180°C for 30°C using a co-solvent of DMAc / toluene in the presence of potassium carbonate. hours, the resulting reaction solution was washed with purified water, and then dried with hot air. At this time, the degree of polymerization of the oligomer is controlled using the Carothers equation.

[0254] [reaction formula 3]

[0255]

[0256] 2) Preparation of hydrophilic repeating units

[0257] As shown in Scheme 4 below, 4,4'-(9-fluorenylidene)biphenol was reacted with bis(4-fluorophenyl)sulfone at 160 °C using a co-solvent of DMAc / toluene in the presence of potassium carbonate After reacting at 180°C for 30 hours, the obtained reaction solution was washed with purified water, and then dried with hot air. At this time, the degree of polymerization of the oligomer is controlled using the Carothers equation...

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Abstract

The present invention relates to a polymer electrolyte membrane, a method for manufacturing the same, and a membrane electrode assembly comprising the same. The polymer electrolyte membrane comprises:a fluorine-based support containing a plurality of pores due to polymer microfibrillar structures; a hybrid porous support placed on one side or both sides of the fluorine-based support and comprising nanowebs obtained by integrating nanofibers into a nonwoven fabric containing a plurality of pores; and ion conductors with which the pores of the porous support are filled. The polymer electrolytemembrane can reduce hydrogen permeability while being excellent in both durability and ion conductivity.

Description

technical field [0001] The present disclosure relates to a polymer electrolyte membrane, a method for preparing the same, and a membrane-electrode assembly including the polymer electrolyte membrane. More particularly, the present disclosure relates to a polymer electrolyte membrane having excellent durability and ion conductivity and capable of reducing hydrogen permeability, a method of manufacturing the same, and a membrane-electrode assembly including the polymer electrolyte membrane. Background technique [0002] A fuel cell is a battery with a power generation system for directly converting chemical reaction energy from an oxidation / reduction reaction between oxygen and hydrogen contained in hydrocarbon substances such as methanol, ethanol, or natural gas into electrical energy. Fuel cells are attracting attention as next-generation green (clean) energy sources capable of replacing fossil fuels due to their high energy efficiency and environmental friendliness, ie, red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1053H01M8/1058H01M8/1039H01M8/1025H01M8/1069H01M8/1004H01M8/1018
CPCY02P70/50Y02E60/50H01M8/1004H01M8/1039H01M8/1053H01M8/1007H01M2008/1095H01M8/106H01M8/1062H01M2300/0082H01M2300/0094H01M8/1058H01M8/1025H01M8/1069H01M8/1006H01M8/1041H01M8/1067H01M8/1044
Inventor 李瞳熏金娜玲李殷受朴重华
Owner KOLON IND INC
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