Gas diffusion electrode for electrochemical cells

Claim 1

A GAS DIFFUSION ELECTRODE FOR AN ELECTROCHEMICAL CELL HAVING A ACIDIC ELECTROLYTE AND IN WHICH CELL THE GAS DIFFUSION ELECTRODE CONTACTS AN ABUTTING ELECTRODE COMPRISING: A. A METAL NET; B. A CORROSION RESISTANT, ELECTROLYTE-AND GAS-IMPERVIOUS, GRAPHITE FOAM COATING ENCASING SAID NET, SAID FORA COATING HAVING A FRAME HAVING ON ONE SIDE TWO SPACED APART, LATERAL EXTENSIONS; C. A POROUS CATALYZING LAYER HAVING A FIRST SIDE DEFINING ONE SIDE OF A GAS CHAMBER, A SECOND SIDE DEFINING ONE SIDE OF AN ELECTROLYTE CHAMBER, A TOP WALL AND A BOTTOM WALL, WITH SAID GRAPHITE FOAM COATING BEING IN CONTACT WITH SAID LAYER ALONG SAID FIRST AND THE EXTENSIONS OF SAID COATING BEING IN CONTACT WITH THE TOP AND BOTTOM WALLS OF THE CATALYST LAYER AND EXTENDING PAST THE SECOND SIDE OF SAID CATALYST LAYER; D. A MAIN ELECTROLYTE INLET CANAL PASSING THROUGH SAID FRAME; E. A MAIN ELECTROLYTE OUTLET CANAL PASSING THROUGH SAID FRAME, F. SUNKEN CANAL MEANS ON ONE OF SAID TWO SPACED APART LATERAL EXTENSIONS OF THE FRAME OF THE GRAPHITE FOAM COATING FOR CONDUCTING ELECTROLYTE FROM THE MAIN INLET ELECTROLYTE CANAL TO THE ELECTROLYTE CHAMBER DEFINED BY SAID SECOND SIDE OF SAID CATALYST LAYER; G. SUNKEN CANAL MEANS ON THE OTHER OF SAID TWO SPACED APART LATERAL EXTENSIONS OF THE FRAME OF THE GRAPHITE COATING FOR CONDUCTING ELECTROLYTE FROM THE ELECTROLYTE CHAMBER DEFINED BY SAID SECOND SIDE OF SAID CATALYST LAYER TO THE MAIN OUTLET ELECTROLYTE CANAL; AND H. AN ELECTRICALLY INSULATING COATING ON SAID FRAME OF THE GRAPHITE-FOAM COTING FOR PREVENTING ELECTRICAL CONTACT BETWEEN THE ELECTROLYTE AND THE GRAPHITE COATING AND FOR PREVENTING ELECTRICAL CONTACT BETWEEN THE ELECTRODE AND AN ABUTTING ELECTRODE.