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Reinforced composite membrane for fuel cell and membrane-electrode assembly for fuel cell comprising the same

A technology for enhanced composite and fuel cells, which is applied to fuel cell components, fuel cells, battery electrodes, etc., and can solve the problem of low competition between fluorine-based ion conductors and fluorine-based porous supports, and the inability of hydrocarbon-based ion conductors to use fluorine-based Porous supports etc.

Active Publication Date: 2015-08-26
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to commercialize fuel cells, the use of fluorine-based ion conductors and fluorine-based porous supports disadvantageously brings about low competitiveness requiring price reduction
[0006] Accordingly, low-cost hydrocarbon-based ion conductors have been developed as alternatives to high-cost fluorine-based ion conductors, but disadvantageously, hydrocarbon-based ion conductors cannot be applied to fluorine-based porous supports

Method used

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  • Reinforced composite membrane for fuel cell and membrane-electrode assembly for fuel cell comprising the same
  • Reinforced composite membrane for fuel cell and membrane-electrode assembly for fuel cell comprising the same

Examples

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Embodiment 1

[0108] The poly(amic acid) / tetrahydrofuran spinning solution with 25% weight concentration is applied to the first spinning nozzle, and the sulfonated polysulfone / tetrahydrofuran spinning solution with 5% weight concentration is applied to the second spinning nozzle, and electrospinning Performed under an applied voltage of 30KV to produce a polyamic acid porous support. Then, the polyamic acid porous support was impregnated in a solution consisting of pyridine and triethylamine mixed at a ratio of 2:1 to induce an imidization reaction, resulting in a porous support with an average thickness of 15 μm and insoluble in organic solvents .

[0109] The resulting porous support was coated twice with a 20% ion conductor solution of sulfonated polyarylethersulfone (S-PAES) as the second ion conductor using a doctor blade. Then, the porous support was dried at 80 °C for 1 hour and placed in a vacuum electric furnace for 1 hour to fabricate a reinforced composite membrane.

[0110] T...

Embodiment 2

[0112] In addition to using a polyamic acid / THF spinning solution with a concentration of 25% by weight and a sulfonated polysulfone / THF spinning solution with a concentration of 5% by weight, so that the ratio of the total weight of polysulfone to polyamic acid is A membrane electrode assembly was produced in the same manner as in Example 1, except that the support body precursor was produced by spinning the resulting mixture in one nozzle.

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Abstract

Disclosed are a reinforced composite membrane for fuel cells including a porous support comprising three-dimensionally irregularly and discontinuously arranged nanofibers of a polymer and a first ionic conductor, and a second ionic conductor filling pores of the porous support, wherein the first ionic conductor is present as nanofibers in the porous support or is present in the nanofibers of the polymer to form the nanofibers together with the polymer, and a membrane-electrode assembly for fuel cells including the same. As a result, impregnation uniformity and impregnation rate of the ionic conductors are improved and proton (hydrogen ion) conductivity is thus enhanced.

Description

technical field [0001] The present invention relates to a reinforced composite membrane for a fuel cell and a membrane electrode assembly for a fuel cell comprising the reinforced composite membrane, which exhibit improved proton ( hydrogen ion) conductivity. Background technique [0002] A fuel cell is a battery that directly converts chemical energy generated by fuel oxidation into electrical energy, and has attracted much attention as a next-generation energy source due to its high energy efficiency and eco-friendliness with less pollutant emissions. Such fuel cells generally have a structure in which an electrolyte membrane is provided between an anode and a cathode. [0003] Typical examples of fuel cells for automobiles include proton exchange membrane fuel cells using protons (hydrogen gas) as fuel. An electrolyte membrane used in a proton exchange membrane fuel cell should basically have high proton conductivity because it acts as a channel for transporting hydroge...

Claims

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Application Information

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IPC IPC(8): H01M8/02C08J5/22H01M8/10
CPCH01M8/1058Y02E60/522H01M8/1069H01M8/1044H01M8/1025C08J5/22H01M8/1062H01M8/106C08J5/2206Y02E60/50Y02P70/50H01M8/02H01M8/10H01M4/8825H01M4/8875H01M8/1004H01M2250/20H01M2300/0082Y02T90/40
Inventor 金娜玲慎镛哲李武锡李瞳熏李殷受
Owner KOLON IND INC
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