Membrane Electrode Assembly, Manufacturing Method Thereof and Fuel Cell

A manufacturing method of an MEA, said method comprising:

• preparing at least two catalyst inks, each of which includes catalyst loaded particles, a polymer electrolyte and a solvent, said catalyst inks having different catalyst concentrations;
• coating each of said at least two catalyst inks on a first substrate and drying the coated catalyst inks to form at least two catalyst sublayers of a cathode catalyst layer and coating each of said at least two catalyst inks on a second substrate and drying the coated catalyst inks to form at least two catalyst sublayers of an anode catalyst layer;
• forming said at least two catalyst sublayers of said cathode catalyst layer on said first substrate in order of decreasing catalyst concentration to obtain a transfer sheet for said cathode catalyst layer;
• forming said at least two catalyst sublayers of said anode catalyst layer on said second substrate in order of increasing catalyst concentration to obtain a transfer sheet for said anode catalyst layer;
• arranging said transfer sheet for said cathode catalyst layer and said transfer sheet for said anode catalyst layer on both surfaces of a polymer electrolyte membrane;
• and
• joining said cathode catalyst layer and said anode catalyst layer to said polymer electrolyte membrane to obtain said MEA.