| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an operation method of a fuel cell which is small in size, low in cost, capable of achieving a long life by well recovering a deterioration of an oxygen electrode. <P>SOLUTION: The operation method of the fuel cell supplies an oxygen-containing gas to oxygen electrodes and a hydrogen-containing gas to fuel electrodes to generate electric power by being provided with a plurality of cells having oxygen electrodes on one faces and fuel electrodes on the other faces of electrolyte layers, respectively, in a state to electrically connect the cells in series with one another. The method applies prescribed high voltages to the oxygen electrodes in a state of stopping the supply of the oxygen-containing gas to the oxygen electrodes while keeping the supply of the hydrogen-containing gas to the fuel electrodes, after that, the high voltages applied to the oxygen electrodes is swept by a low voltages lower than the high voltages applied to the oxygen electrodes. Next, a voltage raising process to sweep the low voltages applied to the oxygen electrodes to the high voltages, is applied, then, an oxygen electrode voltage varying operations to conduct voltage lowering processing to sweep the high voltages to the oxygen electrodes to the low voltages is applied. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
