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Gas diffusion layer for fuel cell, comprising spun carbon nanofiber layer

a carbon nanofiber and fuel cell technology, applied in the direction of fuel cells, cell components, electrical equipment, etc., can solve the problems of reducing power generation efficiency, mechanical stability and chemical stability of sulfone-based polymer membranes or hydrocarbon-based polymer membranes that have not reached satisfactory levels, etc., to achieve excellent heat transfer efficiency, excellent power generation efficiency, and high porosity

Inactive Publication Date: 2020-04-16
GUARDNEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to an electrolyte membrane for fuel cells that has high porosity and uniform pore distribution, leading to excellent heat transfer efficiency and power generation efficiency. The membrane also has excellent mechanical and chemical stability due to a non-conductive nanofiber spun layer that is not subjected to heat treatment.

Problems solved by technology

However, such a conventional electrolyte membrane dose not have excellent thermal conductivity to have a problem in that the power generation efficiency is lowered, and that the mechanical stability and chemical stability of the sulfone-based polymer membrane or the hydrocarbon-based polymer membrane have not reached satisfactory levels.

Method used

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  • Gas diffusion layer for fuel cell, comprising spun carbon nanofiber layer
  • Gas diffusion layer for fuel cell, comprising spun carbon nanofiber layer
  • Gas diffusion layer for fuel cell, comprising spun carbon nanofiber layer

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Embodiment Construction

[0017]Hereinafter, the electrolyte membrane for a fuel cell according to the present invention is described.

[0018]The electrolyte membrane for a fuel cell according to the present invention includes a nanofiber spun layer.

[0019]The nanofiber spun layer according to the present invention is formed by electrospinning a polymer composition.

[0020]In one embodiment of the present invention, the electrospinning is performed by applying a voltage of 30 kV to 70 kV, more preferably a voltage of 40 kV to 60 kV, during the spinning of the polymer composition. If the voltage is less than 30 kV, the splitting of the fibers is not actively performed, and the volatility of the solvent is lowered. If the voltage exceeds 70 kV, a tip-trouble occurs at the tip of the nozzle through which the polymer composition is spun.

[0021]In one embodiment of the present invention, the electrospinning is performed at a temperature of 40° C. to 80° C., preferably a temperature of 50° C. to 80° C. If the temperatur...

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Abstract

The present invention relates to an electrolyte membrane including a nanofiber spun layer for a fuel cell, a membrane-electrode assembly including the electrolyte membrane, and a fuel cell including the membrane-electrode assembly.

Description

TECHNICAL FIELD[0001]The present invention relates to an electrolyte membrane including a nanofiber spun layer for a fuel cell, a membrane-electrode assembly including the electrolyte membrane, and a fuel cell including the membrane-electrode assembly.[0002]This application claims the benefit of Korean Patent Application No. 10-2017-0080431 filed on Jun. 26, 2017, and the entire contents of which are incorporated herein by reference.BACKGROUND ART[0003]A fuel cell is an electrochemical cell that converts chemical energy produced by oxidation of fuel into electrical energy. Recently, various investigations have focused on the development of fuel cells as well as solar cells and the like in order to overcome problems such as consumption of fossil fuels, the greenhouse effect and global warming caused by carbon dioxide, and the like.[0004]A fuel cell generally converts chemical energy into electrical energy through oxidation and reduction of hydrogen and oxygen. In the fuel cell, hydro...

Claims

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Application Information

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IPC IPC(8): H01M8/1016H01M8/0234H01M8/1004H01M8/241
CPCH01M8/1004H01M8/241H01M8/1016H01M8/0234H01M8/1011H01M2008/1095H01M4/926Y02E60/50H01M8/04149H01M4/8605H01M4/96
Inventor PARK, KI HOKIM, BU GONPARK, JONG SU
Owner GUARDNEC