| 摘要 |
A fuel cell is made by laminating an anode channel 2 supplied with hydrogen or a hydrogen-containing gas g<SUB>H</SUB>, a cathode channel 3 supplied with oxygen or an oxygen-containing gas G<SUB>O</SUB>, and an electrolyte 4 arranged between the cathode channel and the anode channel. The electrolyte 4 is made by laminating a hydrogen separating metal layer for making hydrogen supplied to the anode channel 2 or hydrogen in a hydrogen-containing gas G<SUB>H </SUB>supplied to the anode channel 2 permeate; and a proton conductor layer made of ceramics, for establishing the hydrogen having permeated the hydrogen separating metal layer in a proton state and making it reach the cathode channel 3. In addition, the fuel cell has a coolant channel 5 for cooling the fuel cell 1. In the coolant channel 5, a low heat conducting section 55 having a heat conductivity smaller than that at a downstream side of a coolant C is formed at an inlet side of the coolant C.
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