Tantalum nitride coated AISI 316L as bipolar plate for polymer electrolyte membrane fuel cell
| Autor: | Wonhyuk Hong, Hyoseok Choi, Jung-Joong Lee, Changhee Choe |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Metallurgy Energy Engineering and Power Technology Proton exchange membrane fuel cell Electrolyte Condensed Matter Physics Corrosion Anode chemistry.chemical_compound Fuel Technology Tantalum nitride chemistry Sputtering Composite material Thin film Polarization (electrochemistry) |
| Zdroj: | International Journal of Hydrogen Energy. 37:405-411 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2011.09.060 |
| Popis: | Tantalum nitride (TaN) thin films are deposited on AISI 316L stainless steel by inductively coupled, plasma-assisted, reactive magnetron sputtering at various N 2 flow rates. TaN film behavior is investigated in simulated polymer electrolyte membrane fuel cell (PEMFC) conditions by using electrochemical measurement techniques for application as bipolar plates. The results of a potentio-dynamic polarization test under PEMFC cathodic and anodic conditions indicate that the corrosion current density of the TaN x films is of the order of 10 −7 A cm −2 (at 0.6 V) and 10 −8 A cm −2 (at −0.1 V), respectively; these results are considerably better than the individual results for metallic Ta films and AISI 316L stainless steel. The TaN x films exhibit superior stability in a potentio-static polarization test performed under PEMFC cathodic and anodic conditions. The interfacial contact resistance of the films is measured in the range of 50–150 N cm −2 , and the lowest value is 11 mΩ cm 2 at a compaction pressure of 150 N cm −2 . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect