The present invention relates to a membrane electrode assembly comprising a) two electrochemically active electrodes (1, 3) separated by a polymer electrolyte membrane (5) wherein the surfaces of the polymer electrolyte membrane (5) are in contact with the...

Membrane-electrode-unit (I) comprises two electrochemical active electrodes (1,3) (A) (that are separated by a polymer-electrolyte-membrane (5) (B)) and sealing material (7, 9) (C) on the front and the back of (B), which exhibits one or more fissures (11) ...