001055037 001__ 1055037
001055037 005__ 20260227202312.0
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001055037 0247_ $$2datacite_doi$$a10.34734/FZJ-2026-01834
001055037 037__ $$aFZJ-2026-01834
001055037 1001_ $$0P:(DE-Juel1)191140$$aSievert, Tim$$b0$$eCorresponding author$$ufzj
001055037 245__ $$aEntwicklung von Korrosionsschutzschichten für Protonen-Austausch-Membran-Wasserelektrolyseure$$f - 2025-09-30
001055037 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2026
001055037 300__ $$a201
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001055037 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1772191447_10337
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001055037 4900_ $$aSchriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment$$v694
001055037 502__ $$aDissertation, Bochum, 2025$$bDissertation$$cBochum$$d2025
001055037 520__ $$aSince renewable energy sources supply electricity with temporal fluctuations, efficient energy storage methods play a key role in bridging the gap between generation and consumption. Proton exchange membrane water electrolysis (PEM electrolysis) represents a central technical solution in this context. However, its main disadvantage compared to fossil hydrogen production lies in the high investment costs, which are primarily due to corrosion-resistant components made of titanium with noble metal coatings. In particular, bipolar plates (BPP) and porous transport layers (PTL) account for around two thirds of the system costs. The aim of this work is to reduce the capital costs of PEM electrolysers by developing suitable corrosion protection coatings. For this purpose, PTLs made of stainless steel expanded metals are coated with titanium to investigate whether they can replace conventional PTLs made entirely of titanium. In addition, noble-metal-free coatings are being developed to completely substitute the noble metal layers used so far. Metals, nitrides, alloys and conductive oxides are considered as potential coating materials. Different types of PTLs (felts, expanded metals, sintered bodies) as well as different coating methods are investigated. The focus is on thermal spraying (TS) and magnetron sputtering (MS). In addition, corrosion tests are conducted to evaluate both materials and process parameters. The results of PEM electrolysis experiments carried out at IET-4 show that Ti coatings deposited by cold gas spraying on stainless steel expanded metals can achieve almost identical current densities as conventional titanium-felt-based PTLs and can be operated stably for more than 1000 hours. Furthermore, titanium alloys with niobium or tantalum were produced by magnetron sputtering, which form conductive oxide films under corrosive electrolysis conditions. Initial tests show stable current density over a period of 144 hours. Transmission electron microscopy (TEM) also confirmed the successful incorporation of niobium into the titanium oxide layer. These findings support the hypothesis that targeted doping can significantly increase the conductivity of the forming oxide layers and that noble metal free corrosion protection coatings can be used in PEM electrolysers.
001055037 536__ $$0G:(DE-HGF)POF4-1241$$a1241 - Gas turbines (POF4-124)$$cPOF4-124$$fPOF IV$$x0
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001055037 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)191140$$aForschungszentrum Jülich$$b0$$kFZJ
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001055037 9141_ $$y2026
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001055037 9201_ $$0I:(DE-Juel1)IMD-2-20101013$$kIMD-2$$lWerkstoffsynthese und Herstellungsverfahren$$x0
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