Electrode for fuel cell, method of producing the same, and fuel cell including the electrode

A method of producing an electrode used to form a fuel cell, the method comprising:

• mixing a support catalyst, a first solvent, metaphosphoric acid, and a solid acid of boron (B), zirconium (Zr), silicon (Si), tungsten (W), or molybdenum (Mo);
• thermally treating the resultant mixture;
• milling the thermal treatment result to obtain a proton conductor containing powder;
• and
• coating a catalyst layer forming composition, which is prepared by mixing the proton conductor containing powder and a first binder and a second solvent, on a support and drying the coated result, thereby forming a catalyst layer.

A fuel cell comprising:

• opposing electrodes, wherein each electrode comprises:
• a support having a solid state proton conductor synthesized at low temperature with a support catalyst in a catalyst layer;
• and
• an electrolyte membrane, wherein the electrolyte membrane is attached to facing surfaces of the opposing electrodes having the catalyst layer formed thereon.

A fuel cell comprising:

• at least one pair of opposing electrodes, each electrode comprising:
• a support, and
• a catalyst layer formed on the support, the catalyst layer comprising:
• a support catalyst;
• and
• a proton conductor having an amorphous phase of 60% by weight or more, the proton conductor comprising:
• at least one material selected from the group consisting of B2O3, ZrO2, SiO2, WO3, and MoO3, and
• P2O5,
• wherein the amount of the proton conductor is in the range of 0.5 to 60 parts by weight based on 100 parts by weight of the support catalyst;
• and
• an electrolyte membrane, wherein the electrolyte membrane is attached to facing surfaces of the opposing electrodes having the catalyst layer formed thereon.