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

An electrolyte membrane, polymer technology, applied in electrical components, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problems of reduced dimensional stability, reduced open circuit voltage, high moisture content, and minimized hydrogen permeation and dimensional change The effect of chemical, performance improvement, and impregnation improvement

Pending Publication Date: 2021-02-05
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polymer electrolyte membranes with high proton conductivity have the disadvantage of high moisture content and thus reduced dimensional stability
Commercial fluorine-based electrolyte membranes have higher performance than hydrocarbon-based electrolyte membranes, but have disadvantages in that the open circuit voltage (OCV) decreases and the durability of the membrane decreases due to its high hydrogen conductivity

Method used

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

Examples

Experimental program
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Effect test

manufacture example 1

[0144] [Production Example 1: Production of Polymer Electrolyte Membrane]

example 1

[0146] The first porous carrier (e-PTFE, pore size: 0.10 μm to 0.15 μm, thickness: 6 μm, ratio of MD tensile elongation to TD tensile elongation: 1.1) was dispersed in the first ion conductor dispersion (the The first ion conductor dispersion comprises 20% by weight of a highly fluorinated polymer having an equivalent weight (EW) of 800 g / eq) wetted in .

[0147] When the first porous support has been wetted, the second porous support (e-PTFE, pore size: 0.10 μm to 0.15 μm, thickness: 6 μm, the ratio of MD tensile elongation and TD tensile elongation : 1.1) added on the first porous carrier.

[0148] While the second porous support is placed on the first porous support, a second ion conductor dispersion comprising 20% ​​by weight of a highly fluorinated polymer having an equivalent weight (EW) of 800 g / eq is additionally applied to the first porous support. Two porous supports.

[0149] Subsequently, the first porous support and the second porous support were dried at 60° C....

example 2

[0151] The first porous support (e-PTFE, pore size: 0.10 μm to 0.15 μm, thickness: 6 μm, ratio of MD tensile elongation to TD tensile elongation: 1.2) contained 20% by weight of equivalent (EW ) Wet in the first ion conductor dispersion of 800 g / eq highly fluorinated polymer.

[0152] When the first porous support has been wetted, the second porous support (e-PTFE, pore size: 0.10 μm to 0.15 μm, thickness: 6 μm, ratio of MD tensile elongation to TD tensile elongation : 1.2) added on the first porous carrier. At this time, the first e-PTFE carrier and the second e-PTFE carrier are laminated such that the direction in which the first e-PTFE carrier is stretched and the direction in which the second e-PTFE carrier is stretched are perpendicular to each other.

[0153] While the second porous support was placed on the first porous support, a second ion conductor dispersion comprising 20% ​​by weight of a highly fluorinated polymer having an equivalent weight (EW) of 800 g / eq was ...

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Abstract

The present invention relates to a polymer electrolyte membrane, a manufacturing method therefor, and a membrane electrode assembly comprising same, the polymer electrolyte membrane comprising: a first porous support having first pores filled with a first ion conductor; and a second porous support having at least one second pore filled with the first ion conductor and third pores filled with a second ion conductor, wherein the first and second porous supports are in contact with each other. The polymer electrolyte membrane has enhanced performance through the improvement of impregnation properties and enhanced mechanical and chemical durability through the minimization of hydrogen permeability and dimensional change. Furthermore, an interface between the ion conductor and the support in the polymer electrolyte membrane can be stably maintained for a long time.

Description

technical field [0001] The present disclosure relates to a polymer electrolyte membrane, a method of manufacturing the polymer electrolyte membrane, and a membrane electrode assembly including the polymer electrolyte membrane, and more particularly, to: a polymer electrolyte membrane, the polymer electrolyte membrane being Configured such that the impregnation of the polymer electrolyte membrane is improved, thereby improving the performance of the polymer electrolyte membrane, hydrogen crossover and dimensional changes of the polymer electrolyte membrane are minimized, and the mechanical and chemical durability of the polymer electrolyte membrane is improved. The properties are improved, and the interface between the ion conductor and the carrier is stably maintained for a long time; the manufacturing method of the polymer electrolyte membrane; and the membrane electrode assembly including the polymer electrolyte membrane. Background technique [0002] A fuel cell is a batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1058H01M8/1053H01M8/1067H01M8/1081H01M8/1004H01M8/1018
CPCH01M8/1081H01M8/1053H01M8/1067Y02P70/50Y02E60/50H01M8/1062H01M8/1039H01M8/1058H01M8/1004H01M2008/1095
Inventor 金娜玲李武锡李瞳熏李殷受廉承辑朴重华
Owner KOLON IND INC