| abstract |
CCM formed of a membrane having on one of the two surfaces a first electrocatalytic layer containing a catalyst and on the other one a second electrocatalytic layer containing a catalyst, said electrocatalytic layers and said membrane containing (per)fluorinated ionomers, said CCM having the following characteristics: n- size variations, for both the orthogonal directions of the plane xy, lower than 15%, by dipping the CCM, after drying at 105°C under vacuum for one hour in demineralized water at 100°C for 30 minutes; n- the CCM remains substantially unchanged after having been subjected to treatments of 60 cycles by dipping in water at 80°C for 8 hours and then in water at the temperature of 25°C for 16 hours; n- the orthogonal projection of the perimeter of the first electrocatalytic layer on the second layer is distant from the perimeter of the second layer at least 1 mm in each point. |