| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel cell stack in which reaction gas can be equally supplied over the whole area of a reaction gas passage with a simple and economical constitution, so that desired power generation performance can be secured.SOLUTION: In a fuel cell 11 constituting a fuel cell stack 10, an electrolyte membrane-electrode assembly 12 is held with a cathode side separator 14 and an anode side separator 16. In the cathode side separator 14, an inlet buffer part 32a and an oxidant gas inlet communication hole 18a are connected with an inlet coupling passage 33a. The oxidant gas inlet communication hole 18a forms a curved surface where an end wall face 18ae1 projects outward, and an end wall face 18ae2 forms a flat surface. |
