High temperature polymer electrolyte membrane fuel cell and method for manufacturing same

A method for manufacturing a fuel cell comprising a high temperature polymer electrolyte membrane, wherein the fuel cell comprises an electrolyte membrane comprising a phosphoric acid-doped polymer of intrinsic microporosity, a cathode disposed on a first surface of the electrolyte membrane, and an anode disposed on a second surface of the electrolyte membrane, the second surface opposite the first surface, the method comprising:

• preparing a solution comprising a first precursor represented by
• wherein n is a number from 10 to 30;
• applying the solution onto a substrate to form a first film;
• impregnating the first film with an aqueous sodium hydroxide (NaOH) solution to obtain a second film comprising a second precursor in which bromine ions of the first precursor are substituted with hydroxide ions;
• and
• impregnating the second film with phosphoric acid to obtain the electrolyte membrane.