Membrane electrode array for high temperature polymer electrolyte fuel cell, e.g. for road vehicle, spacecraft or power station, has basic polymer membrane between flat gas distribution electrodes acting as membrane dopant reservoir

摘要

Membrane electrode array (MEA) for polymer electrolyte fuel cell with operating temperature up to 250 degrees C has membrane of basic polymer(s), sandwiched between 2 flat gas distribution electrodes that are charged with dopant and act as dopant reservoir for the membrane. After pressure and heat treatment, the doped membrane is proton-conducting and firmly bound to the electrodes. When doped, its conductivity is not less than 0.1 S/m at a temperature not less than 25 degrees C. Independent claims are also included for the following: (1) polymer membrane for an MEA, consisting of a polymer containing basic polymer(s), with a mechanical stability of over 110 N/mm2 breaking strength and over 6% elongation at room temperature; (2) polymer electrolyte fuel cells for an operating temperature up to 250 degrees C with the specified MEA between bipolar plates.