Fallisch, ArneArneFallischSchellhase, LeonLeonSchellhaseFresko, J.J.FreskoZechmeister, M.M.ZechmeisterZedda, MarioMarioZeddaOhlmann, JensJensOhlmannZielke, L.L.ZielkePaust, N.N.PaustSmolinka, TomTomSmolinka2022-03-052022-03-052017https://publica.fraunhofer.de/handle/publica/24833610.1016/j.ijhydene.2017.01.166Hydrogen as a secondary energy carrier promises a large potential as a long term storage for fluctuating renewable energies. In this sense a highly efficient solar hydrogen generation is of great interest especially in southern countries having high solar irradiation. The patented Hydrogen Concentrator (HyCon) concept yields high efficiencies combining multi-junction solar cells with proton exchange (PEM) membrane water electrolysis. In this work, a special PEM electrolysis cell for the HyCon concept was developed and investigated. It is shown that the purpose-made PEM cell shows a high performance using a titanium hybrid fiber sinter function both as a porous transport layer and flow field. The electrolysis cell shows a high performance with 1.83 V at 1 A/cm2 and 24 °C working under natural convection with a commercially available catalyst coated membrane. A theoretical examination predicts a total efficiency for the HyCon module from sunlight to hydrogen of approximately 19.5% according to the higher heating value.enEnergietechnikWasserstofftechnologieWasserstofferzeugung durch ElektrolyseElectrolysissolar hydrogen productionCPVIII-V solar cell539journal article