| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an operation method of a fuel cell capable of recovering deterioration due to a deterioration causing gas in order to reduce the cost and size of the fuel cell by obviating the need of installation of a gas processing device. <P>SOLUTION: In this operation method of a fuel cell wherein a plurality of cells C each having an oxygen electrode 2 on one surface of an electrolyte layer 1 and a fuel electrode 3 on the other surface thereof are arranged in a state electrically connected in series to one another, and power is generated by supplying an oxygen-containing gas to the oxygen electrodes 2, and supplying a hydrogen-containing gas to the fuel electrodes 3, a deterioration recovery process of recovering the deterioration of the oxygen electrodes 2 by stopping supply of the oxygen-containing gas to the oxygen electrodes 2 and making hydrogen exist in the oxygen electrodes 2 is executed by hydrogen permeating from the fuel electrode 3 side to the oxygen electrode 2 side by forming a state where current is not carried to the cells C, supplying the hydrogen-containing gas to the fuel electrodes 3, and stopping the supply of the oxygen-containing gas to the oxygen electrodes 2. <P>COPYRIGHT: (C)2009,JPO&INPIT |
