NOVELTY - A fuel cell comprises fuel system fluidly connected to fuel cell body (20) containing membrane electrode assembly, and first monopolar plate having fuel flow field fluidly contacting to anode gas diffusion layer, and is disposed on diffusion layer. The assembly comprises ion exchange membrane (10), anode catalyst layer (11) on membrane surface, anode gas diffusion layer (12), and cathode catalyst layer (13) on other surface of membrane. The cathode layer also comprises conductive enhancement structure of conductive metal line embedded into cathode layer.    USE - In on-site generators for large buildings, power supplies for electric vehicles, and portable power supplies.    ADVANTAGE - The fuel cell is small portable fuel cell. The cathode electrode comprises a catalyst layer, but does not comprise a cathode gas diffusion layer, thus increases the amount of oxygen supplied to the cathode electrode by natural convection. The reduction in current collection at the cathode electrode is compensated by the highly-conductive conductive enhancement structure embedded in the cathode catalyst layer as well as the increased compression rate of the cathode catalyst layer. According, the volume of the membrane electrode assembly is decreased and the supply amount of air at the cathode is increased, thus improves the output of the membrane electrode assembly. The conductive enhancement structure improves the current collection of the cathode catalyst layer.    DETAILED DESCRIPTION - A fuel cell comprises fuel cell body (20), and fuel system fluidly connected to the body. The body comprises membrane electrode assembly, and first monopolar plate having fuel flow field fluidly contacting to anode gas diffusion layer, and is disposed on the diffusion layer. The assembly comprises ion exchange membrane (10), anode catalyst layer (11) disposed on membrane surface, anode gas diffusion layer (12) contacting the anode catalyst layer, and cathode catalyst layer (13) disposed on other surface of membrane. The cathode catalyst layer has thicker thickness than that of the anode layer; has a higher compression rate than the anode catalyst layer; and comprises conductive enhancement structure having conductive metal line embedded into cathode layer. An INDEPENDENT CLAIM is included for a membrane electrode assembly comprising ion exchange membrane having two surfaces; the anode catalyst layer; the anode gas diffusion layer; and the cathode catalyst layer.    DESCRIPTION OF DRAWING(S) - The figure shows a perspective view of a fuel cell body comprising the membrane electrode assembly.    Ion exchange membrane (10)    Anode catalyst layer (11)    Anode gas diffusion layer (12)    Cathode catalyst layer (13)    Current collector (15)    Inner wiring (16)    Fuel cell body. (20)