METHOD OF ACTIVATING FUEL CELL

PURPOSE: An activating method of a fuel cell is provided to prevent the catalytic deterioration of a cathode during activation, thereby improving the durability of a fuel cell. CONSTITUTION: An activating method of a fuel cell including an anode, a cathode, and a stack comprises a step of supplying a mixed gas to the cathode while maintaining fuel supply to the anode (S1); a step of applying a load lower than a predetermined load after (S2); a step of stopping the supply of the fuel gas (S3); a step of supplying the mixed gas to the cathode when the voltage of the stack is a predetermined voltage or less (S4); a step of applying a load higher than the predetermined load to the stack (S6). [Reference numerals] (AA) Start; (BB) End; (S1) Supplying a mixed gas to the cathode of a fuel cell; (S2) Applying a low load to a fuel cell stack; (S3) Stop supplying the mixed gas to the cathode; (S4) Supplying the mixed gas to the cathode when the voltage of the stack is a predetermined voltage or less; (S5) Repeating the step 3 (S3) - the step 4 (S4) one or more; (S6) Increasing the load applied to the stack; (S7) Supplying air only to the cathode