Membrane-electrode assembly for fuel cell with binder layer having inorganic additive and fuel cell system using the same

A fuel cell system comprising:

• an electricity generating element comprising:
• a membrane-electrode assembly comprising:
• an anode comprising a catalyst layer;
• a cathode facing each other comprising a catalyst layer;
• a polymer electrolyte membrane positioned between the anode and the cathode;
• a first binder layer disposed between the polymer electrolyte membrane and the anode, the polymer electrolyte membrane adhering to the anode through the first binder layer;
• and
• a second binder layer disposed between the polymer electrolyte membrane and the cathode, the polymer electrolyte membrane adhering to the cathode through the second binder layer;
• and wherein
• the polymer electrolyte membrane, the first binder layer and the second binder layer comprise a cation exchange resin and an inorganic silicate;
• and the mixing ratio of the cation exchange resin and the inorganic silicate is in a range of 98 wt % to 90 wt %:2 wt % to 10 wt %;
• and
• the weight of the mixture of the cation exchange resin and the inorganic silicate of the first binder is in a range of 10 wt % to 20 wt % with respect to the weight of the catalyst in the anode;
• and
• the weight of the mixture of the cation exchange resin and the inorganic silicate of the second binder is in a range of 10 wt % to 20 wt % with respect to the weight of the catalyst in the cathode;
• a separator, the electricity generating element generating electricity through oxidation of a fuel and reduction of an oxidant;
• a fuel supplier connected to the electricity generating element for supplying a fuel to the electricity generating element;
• and
• an oxidant supplier connected to the electricity generating element for supplying an oxidant to the electricity generating element;
• and
• the inorganic silicate comprising one selected from the group consisting of pyrophylite-talc, montmorillonite (MMT), fluorohectorite, kaolinite, vermiculite, illite, and combinations thereof.