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

Abstract

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

1 . A gas diffusion layer comprising a carbon nanofiber spun layer for a fuel cell, wherein the carbon nanofiber spun layer is formed by electrospinning a polymer composition. 
     
     
         2 . The gas diffusion layer according to  claim 1 , wherein the electrospinning is performed by applying a voltage of 30 kV to 70 kV. 
     
     
         3 . The gas diffusion layer according to  claim 1 , wherein the electrospinning is performed at a temperature of 40° C. to 80° C. 
     
     
         4 . The gas diffusion layer according to  claim 1 , wherein the carbon nanofiber spun layer is formed by heat-treating the carbon nanofiber spun layer formed by the electrospinning. 
     
     
         5 . A membrane-electrode assembly for a fuel cell, the assembly comprising:
 an electrolyte membrane; and   an anode electrode and a cathode electrode facing each other with the electrolyte membrane interposed therebetween,   wherein each of the anode electrode and the cathode electrode includes a gas diffusion layer and a catalyst layer, and   wherein the gas diffusion layer is the gas diffusion layer for a fuel cell   
     
     
         6 . A fuel cell comprising:
 a stack including one or more membrane-electrode assemblies and a separator interposed between the membrane-electrode assemblies;   a fuel supply unit for supplying fuel to the stack; and   an oxidant supply unit for supplying an oxidant to an electricity generating unit.