Abstract: A fuel cell having a proton-exchange membrane, an anode, and a cathode. The anode and cathode are fixed on opposing sides of the proton-exchange membrane. The anode demarcates a flow conduit between a molecular-hydrogen inlet area and a molecular-hydrogen outlet area. A quantity of catalyst at the molecular-hydrogen outlet area is smaller than a quantity of catalyst at the molecular-hydrogen inlet area. The anode also has a thickness that decreases continuously between the molecular-hydrogen inlet and outlet areas.

Abstract: The fuel cell, generating electric power from oxygen and hydrogen ions and comprising an anode (A), a magnetic cathode, comprising an active layer (2),and a proton electrolyte (1) between the anode and the cathode, comprises a network (3) of permanent magnets (4) designed to increase the diffusion of oxygen in the active layer. The centers of the magnets (4) of the network (3) of permanent magnets are preferably arranged with a two-dimensional distribution in a plane arranged at the interface between the electrolyte (1) and the active layer (2), the magnets being magnetized in parallel manner along the axis perpendicular to this plane. In this way, all the poles of one polarity (S) are surrounded by the active layer (2), all the poles of opposite polarity (N) being surrounded by the electrolyte (1).

Abstract: The invention relates to a fuel cell with a stack comprising an electrolytic membrane (4), with front and rear faces (4a, 4b) on which first and second current collectors (13, 15) are respectively arranged, each comprising a metallic deposit and provided with a number of transverse passages. First and second electrodes (14, 16) are respectively arranged on the first and second current collectors (13, 15) such as to come into direct contact with the electrolytic membrane (4).

Abstract: The PEM (Proton Exchange Membrane) type basic fuel cell element has a high efficient when only the protons migrate towards the cathode, excluding any other species that could react with the cathode. It is composed mainly of a silicon substrate (25) crossed by pipes (26), terminating on the bottom of a dish. The cathode (20) is deposited on the bottom of this dish, covered by a first layer of electrolyte (23). An internal part (32) of the anode is embedded between two layers (23) of electrolyte, while an external part (31) is placed on the upper part of it. The internal part (32) is preferably a grid or a foam such that fuel migrating towards the cathode can be consumed and protons can pass through.

Abstract: The invention relates to a fuel cell with a stack comprising an electrolytic membrane (4), with front and rear faces (4a, 4b) on which first and second current collectors (13, 15) are respectively arranged, each comprising a metallic deposit and provided with a number of transverse passages. First and second electrodes (14, 16) are respectively arranged on the first and second current collectors (13, 15) such as to come into direct contact with the electrolytic membrane (4).

Abstract: The fuel cell, generating electric power from oxygen and hydronium ions and comprising an anode (A), a magnetic cathode, comprising an active layer (2), and a proton electrolyte (1) between the anode and the cathode, comprises a network (3) of permanent magnets (4) designed to increase the diffusion of oxygen in the active layer. The centers of the magnets (4) of the network (3) of permanent magnets are preferably arranged with a two-dimensional distribution in a plane arranged at the interface between the electrolyte (1) and the active layer (2), the magnets being magnetized in parallel manner along the axis perpendicular to this plane. In this way, all the poles of one polarity (S) are surrounded by the active layer (2), all the poles of opposite polarity (N) being surrounded by the electrolyte (1).

Abstract: The PEM (Proton Exchange Membrane) type basic fuel cell element has a high efficiency, when only the protons migrate towards the cathode, excluding any other species that could react with the cathode. It is composed mainly of a silicon substrate (25) crossed by pipes (26), terminating on the bottom of a dish. The cathode (20) is deposited on the bottom of this dish, covered by a first layer of electrolyte (23). An internal part (32) of the anode is embedded between two layers (23) of electrolyte, while an external part (31) is placed on the upper part of it. The internal part (32) is preferably a grid or a foam such that fuel migrating towards the cathode can be consumed and protons can pass through.

Abstract: The invention relates to a process for production of an electrode-membrane-electrode assembly on a cylindrical substrate (1), characterized in that the electrode-membrane-electrode assembly is made by successively depositing an electrode layer (2, 3), a membrane layer (4) and an electrode layer (5, 6) around the said cylindrical substrate, the said substrate being composed of a material that can be totally or partially eliminated during an elimination step at the end of the said process.