Abstract: The invention relates to a membrane-electrode assembly (100), comprising two electrodes (110, 110?) and a membrane (120), preferably a polymer electrolyte membrane (PEM), which is disposed between the two electrodes (110, 110?), wherein the membrane-electrode assembly (100) comprises a first cover layer (130; 130?) and a second cover layer (140; 140?) on at least one flat side, preferably on both flat sides of the membrane (120), characterized in that the first cover layer (130; 130?) covers an edge face (125, 125?) of the membrane (120) and an electrode edge face (115, 115?) facing the membrane (120) and the second cover layer (140; 140?) partially covers the first cover layer (130; 130?), preferably in edge regions of the membrane-electrode assembly (100). The present invention further relates to a fuel cell which comprises a membrane-electrode assembly (100).

Abstract: This invention is based on the preparation of new solid acid triphosphates with compositions of the general formula M(IV)(HPO4)(H2PO4)2, where M(IV) is a tetravalent metal or a mixture of tetravalent metals. These compounds are insoluble in water the greater part of most organic solvents. They show a high non-water assisted protonic conductivity (about 0.01-0.04 S/cm at 100° C. and a relative humidity lower than 1%). These compounds can be used as proton conduction separators in electrochemical devices, to operate at low relative humidity values, as for example in different fuel cells, protonic pumps for electrochemical hydrogenation and dehydrogenation of organic compounds, or for hydrogen production from hydrogenated organic compounds by electro-reforming, or also for removing hydrogen from equilibrium reactions. These compounds can also be used in electrochemical sensors, in super capacitors and as acid catalysts in non-aqueous or anhydrous gaseous phases.

Abstract: The present invention relates to a hybrid material, its use and its production process. The hybrid material comprises a polymer with acid groups. The inorganic part of the said hybrid material is constituted by the combination of at least two metal oxide components, whereof at least one comprises a functional group permitting an interaction and a spatial relationship with the acid groups of the polymer.