| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell stack with a simple structure capable of preventing cooling water and reaction gas from contacting a metallic collector plate. <P>SOLUTION: There are provided a membrane electrode assembly 1 in which gas diffusion electrodes are arranged on both sides of a solid polymer membrane, and separators 2 and 3 on at least one face of each of which a fuel gas circulation channel and an oxidant gas circulation channel 4 supplying fuel gas and oxidant gas to the gas diffusion electrodes are provided. A laminate is configured by laminating a plurality of fundamental constituents each of which is configured by arranging the membrane electrode assembly 1 and the separators 2 and 3 so that the fuel gas circulation channel contacts one face of the gas diffusion electrodes and so that the oxidant gas circulation channel contacts another face of the gas diffusion electrodes, and this laminate is held between end plates each of which is constructed from a conductive inner plate 21 and an insulative outer plate 22. Through the conductive inner plate 21, a current generated by the fuel cell stack is taken to the outside, fluids supplied to and discharged from the fuel cell stack contact only the insulative outer plate 22 in a portion of the end plate. <P>COPYRIGHT: (C)2012,JPO&INPIT |
