Fuel cell, and fuel cell stack

摘要

A fuel cell (3) includes interconnectors (hereinafter, IC) (12, 13), a cell body (20) disposed between the ICs and including an air electrode (14) and a fuel electrode (15) on both surfaces of an electrolyte (2), and current collecting members (18, 19) disposed between at least one of the electrodes (14, 15) and the ICs. The current collecting members (19) include connector contact portions (19a) in contact with the IC (13), cell body contact portions (19b) in contact with the cell body (20), and connecting portions (19c) that are bent approximately 180 degrees and connect both the contact portions. The connector contact portions include asperities (19e) on outside surfaces of the connector contact portions on the side where the connector contact portions are in contact with the IC 13, and a spacer (58) is disposed between the connector contact portions and the cell body contact portions.

主权项

1. A fuel cell comprising:
a pair of interconnectors; a cell body, which is disposed between the interconnectors, and which includes an air electrode on one surface of an electrolyte and a fuel electrode on the other surface; and a current collecting member, which is disposed between at least one of the air electrode and the fuel electrode, and the interconnectors, and which is arranged to electrically connect the air electrode and/or the fuel electrode with the interconnectors, wherein the current collecting member comprises a connector contact portion that is in contact with the interconnector, a cell body contact portion that is in contact with the cell body, and a connecting portion that is bent approximately 180 degrees and connects the connector contact portion and the cell body contact portion, the connector contact portion, the cell body contact portion and the connecting portion being formed in line, and the connector contact portion comprising asperities having surface roughness of which ten-point average roughness is Rz≧4 μm on an outside surface that is a surface of the connector contact portion on the side where the connector contact portion is in contact with the interconnector, and wherein the fuel cell comprises a spacer disposed between the connector contact portion and the cell body contact portion that are opposed to each other between the cell body and the interconnector.