NOVELTY - The method for operating fuel cell that comprises proton conducting polymer electrolyte membrane or polymer electrolyte matrix, a catalyst layer that exists itself on both sides of the polymer electrolyte membrane or polymer electrolyte matrix, an electrical conductive gas diffusion layer that exists itself on both sides of the catalyst layer, and a bipolar plate that exists itself on both sides of the gas diffusion layer, comprises providing hydrogen containing gases by a gas channel existing in the bipolar plate through the gas diffusion layer to catalyst layer on the anode side.    USE - Method for operating a fuel cell.    ADVANTAGE - The method ensures operating of fuel cell with better storage capacity without loss of performance and reduction of the lifespan.    DETAILED DESCRIPTION - The method for operating fuel cell that comprises proton conducting polymer electrolyte membrane or polymer electrolyte matrix, a catalyst layer that exists itself on both sides of the polymer electrolyte membrane or polymer electrolyte matrix, an electrical conductive gas diffusion layer that exists itself on both sides of the catalyst layer, and a bipolar plate that exists itself on both sides of the gas diffusion layer, comprises providing hydrogen containing gases by a gas channel existing in the bipolar plate through the gas diffusion layer to catalyst layer on the anode side, providing a gas mixture containing oxygen and nitrogen by the gas channel through the gas diffusion layer to the catalyst layer on the cathode side, producing protons at the catalyst layer on the anode side, diffusing the produced protons through the polymer electrolyte membrane or matrix, reacting the proton with oxygen containing gas brought to the cathode side, and tapping the voltage potentials to be formed over the anode and cathode side of the bipolar plate. For switching off the fuel cell, the supply of the gas mixture, which consists of oxygen and nitrogen is interrupted, and the oxygen existing at the cathode by conversion with the available protons. The residual oxygen content at the cathode side of the fuel cell is lowered at a concentration of 1 vol.% and less. The polymer electrolyte membrane comprises materials in which the polymer has a covalent bound acid or the polymer is doped with an acid. The polymer electrolyte matrix comprises a basic polymer and an acid. The polymer electrolyte membrane or polymer electrolyte matrix is a blend of two different polymers and is operated at a temperature of above 100 degrees C without additional moistening of the hydrogen containing gases. The fuel cell is operated above 120 degrees C. The hydrogen containing gas is a pure hydrogen or a gas that consists of 20 vol.% of hydrogen, or is a reformate that is produced in an upstream reformatting stage from hydrocarbons. The hydrogen containing gas consists of 5 vol.% of carbon monoxide. The gas mixture is a synthetic gas mixture of oxygen and nitrogen or air. The supply of gas mixture is carried out on the cathode side in pressure free manner and the flow rate exists itself in a range of maximum 5 times of stoichiometric surplus. During switching off the fuel cell, a current is pulled until the fuel cell tension drops. The water containing gas is brought on the anode side until the residual oxygen content is reached to a desired concentration. The gas supply is locked on the anode side against the environment. The nitrogen remaining in the cathode side is used for flushing the anode side.    DESCRIPTION OF DRAWING(S) - The figure shows a graph of comparison of cell voltage of cell one and two as function of the amount of start-stop-cycle.