Low-Cost and Durable Bipolar Plates for Proton Exchange Membrane Electrolyzers
| Autor: | O. Freitag, Pawel Gazdzicki, Renate Hiesgen, Aldo Saul Gago, Rami Abouatallah, Bilge Saruhan, Philipp Lettenmeier, Tobias Morawietz, Kaspar Andreas Friedrich, Rainey Wang |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Proton exchange membrane fuel cell chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Article Corrosion Coating Electrolyzer Proton Exchange Composite material PEM electrolysis corrosion Multidisciplinary Elektrochemische Energietechnik Membrane Sputter deposition 021001 nanoscience & nanotechnology 0104 chemical sciences Anode chemistry Physical vapor deposition engineering 0210 nano-technology bipolar plate Layer (electronics) Titanium |
| Zdroj: | Scientific Reports |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/srep44035 |
| Popis: | Cost reduction and high efficiency are the mayor challenges for sustainable H2 production via proton exchange membrane (PEM) electrolysis. Titanium-based components such as bipolar plates (BPP) have the largest contribution to the capital cost. This work proposes the use of stainless steel BPPs coated with Nb and Ti by magnetron sputtering physical vapor deposition (PVD) and vacuum plasma spraying (VPS), respectively. The physical properties of the coatings are thoroughly characterized by scanning electron, atomic force microscopies (SEM, AFM); and X-ray diffraction, photoelectron spectroscopies (XRD, XPS). The Ti coating (50 μm) protects the stainless steel substrate against corrosion, while a 50-fold thinner layer of Nb decreases the contact resistance by almost one order of magnitude. The Nb/Ti-coated stainless steel bipolar BPPs endure the harsh environment of the anode for more than 1000 h of operation under nominal conditions, showing a potential use in PEM electrolyzers for large-scale H2 production from renewables. |
| Databáze: | OpenAIRE |
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