Method for manufacturing membrane electrode assembly of fuel cell

A method of manufacturing a membrane electrode assembly of a fuel cell having two gas diffusion electrodes and an electrolyte membrane interposed between the gas diffusion electrodes, comprising steps of:

• a) cutting an electrolyte membrane into a predetermined size having first height and first width dimensions;
• b) preparing the cut electrolyte membrane;
• c) soaking the cut electrolyte membrane in a solvent thereby expanding the electrolyte membrane at a predetermined expanding rate;
• d) preparing a catalyst slurry and coating the catalyst slurry onto at least one side of the expanded electrolyte membrane, thereby forming a catalyst layer on the expanded electrolyte membrane, the catalyst layer having predetermined second height and second width dimensions less than the first height and first width dimensions;
• e) drying the electrolyte membrane coated with catalyst layer to evenly shrink the first and second height and width dimensions of the electrolyte membrane and the catalyst layer;
• and
• f) interposing the electrolyte membrane between two gas diffusion electrodes to form the membrane electrode assembly.