Method for recovering performance of hydrogen-rich fuel cell stack

The invention discloses a method for recovering the performance of a hydrogen-rich fuel cell stack, and belongs to the technical field of fuel cells. The method comprises the following steps: (1) carrying out nitrogen purging on a hydrogen-rich fuel cell stack, then introducing pure hydrogen into the anode side of the hydrogen-rich fuel cell stack, carrying out a reduction reaction, and after the reaction is completed, cutting off hydrogen supply; (2) introducing air into the cathode side of the hydrogen-rich fuel cell stack, carrying out an oxidation reaction, and cutting off air supply after the reaction is completed; and (3) repeating the step (1) and the step (2) for multiple times to complete recovery of the performance of the hydrogen-rich fuel cell stack. By adopting the treatment method provided by the invention, the performance of the hydrogen-rich fuel cell stack used for a long time can be recovered, and the initial performance is improved by more than 10%. The treatment method is simple, the hydro