| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize both flooding prevention at the exit part and drying prevention at the entrance part in both of a fuel gas passage and an oxidizer gas passage in a fuel battery cell. <P>SOLUTION: In a unit cell C of a fuel cell stack S, the flowing direction of an oxidizer gas passage 21 installed on the oxidizer gas side separator 2 and a fuel gas passage 31 installed on a fuel gas side separator 3 is made to be opposed. On the exit part 23 side of the oxidizer gas passage 21, a heat insulating coating layer 5A is arranged between the oxidizer gas side separator 2 and a cooling medium passage 4 and an heat insulating region 24 where the temperature on the oxidizer gas side is higher than the fuel gas side is formed and moisture is permeated to the entrance part 32 side of the fuel gas passage 31. On the exit part 33 side of the fuel gas passage 31, a heat insulating coating layer 5B is arranged between the fuel gas side separator 3 and the cooling medium passage 4, and an heat insulating region 34 where the temperature on the fuel gas side is higher than the oxidizer gas side is formed and moisture is permeated to the entrance part 22 side of the oxidizer gas passage 21. <P>COPYRIGHT: (C)2009,JPO&INPIT |
