NOVELTY - The fuel cell device with circulating electrolytes comprises: a cell presenting a positive compartment (10) with an anode (2) and a negative compartment (20) with a cathode (1); a catholyte tank equipped with a first catholyte supply control in the positive compartment and a second control of evacuation of the catholyte of the positive compartment; a first pump allowing the circulation of the catholyte in a circuit; and an anolyte tank equipped with a first anolyte supply control in the negative compartment and a second control of evacuation of the anolyte of the negative compartment.    USE - The fuel cell device is useful in an electric vehicle and in residential or buildings for heating, air-conditioning or current supplying.    ADVANTAGE - The device continuously generates electrical energy, and supports other intermittent energy sources on request to rapidly store and reuse the electrical energy thus rapidly refilling the device.    DETAILED DESCRIPTION - The fuel cell device with circulating electrolytes comprises: a cell presenting a positive compartment (10) equipped with an anode (2) and a negative compartment (20) equipped with a cathode (1), where the compartments are separated by a permeable membrane (3) with ions; a catholyte tank equipped with a first catholyte supply control in the positive compartment and a second control of evacuation of the catholyte of the positive compartment; a first pump allowing the circulation of the catholyte in a circuit including the catholyte tank, a first drain pipe of the catholyte in the positive compartment, the positive compartment and a second drain pipe of the catholyte; an anolyte tank equipped with a first anolyte supply control in the negative compartment and a second control of evacuation of the anolyte of the negative compartment; and a second pump allowing the circulation of the anolyte in a circuit including the anolyte tank, a first drain pipe of the anolyte in the negative compartment, the negative compartment and a second drain pipe of the anolyte. The cathode and the anode include a porous three-dimensional structure. The positive compartment includes a downstream positive compartment and an upstream positive compartment separated by the anode. The first drain pipe of catholyte is connected to the upstream positive compartment, and the second drain pipe of the catholyte is connected to the downstream positive compartment. The negative compartment includes a downstream negative compartment and an upstream negative compartment separated by the cathode. The first drain pipe of the anolyte is connected to the upstream negative compartment, and the second drain pipe of the anolyte is connected to the downstream negative compartment. The catholyte and the anolyte forward by percolation through the anode and the cathode. The cathode and/or the anode are made of a material consisting of foams, felts and superpositions of fabric, a graphite fiber felt and polymeric film. A catalyst is fixed by covalent bond at surface of the cathode and/or of the anode. The catalyst is fixed in a covalent way to the polymeric film.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a fuel cell device (Drawing includes non-English language text).    Cathode (1)    Anode (2)    Permeable membrane (3)    Positive compartment (10)    Negative compartment. (20)