Soldering a gas diffusion layer to a stainless steel bipolar plate using metallic tin
| Autor: | Alejandro Oyarce Barnett, Frode Seland, Ole Edvard Kongstein, Katie McCay, Anders Ødegård |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Interfacial contact resistance Energy Engineering and Power Technology chemistry.chemical_element Proton exchange membrane fuel cell 02 engineering and technology engineering.material Metal Coating Electrodeposition 0502 economics and business 050207 economics Composite material Stainless steel bipolar plate Renewable Energy Sustainability and the Environment 05 social sciences Contact resistance 021001 nanoscience & nanotechnology Condensed Matter Physics PEM fuel cell Fuel Technology chemistry Tin Soldering visual_art Melting point engineering visual_art.visual_art_medium 0210 nano-technology Voltage |
| Zdroj: | International journal of hydrogen energy |
| Popis: | A novel investigation to decrease the interfacial contact resistance of stainless steel bipolar plates was performed. A thin layer of Sn was electrodeposited onto a bipolar plate and subsequently joined with a gas diffusion layer through hot-pressing at a temperature around the melting point of tin. This procedure was optimised, depositing 30 μm of Sn onto the stainless steel bipolar plate before hot-pressing at 230 °C and 0.5 bar for 20 min. A contact resistance of 5.45 mΩ cm2 at 140 N cm−2 was obtained, with low values maintained after exposure to both in-situ and ex-situ conditions. The in-situ testing in a fuel cell produced excellent results, with minor increases in contact resistance from 8.8 to 9.2 mΩ cm2 and decreases in cell voltage from 0.714 to 0.667 V after 200 h of operation. These values are comparable to gold plated stainless steel, showing that combining a gas diffusion layer with electrodeposited Sn through hot-pressing is a promising low-cost coating for bipolar plates in PEM fuel cells. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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