期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 26, 页码 13855-13864出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.09.085
关键词
Trace-metal contamination; Bipolar plates; Single-cell test; New european driving cycle (NEDC); Global hydrogen starvation; Proton exchange membrane fuel cells
资金
- Strategic Vehicle Research and Innovation program (FFI)
- Swedish Foundation for Strategic Research (SSF)
- Swedish governmental initiative StandUp for Energy
Trace-metal contamination can affect the performance and stability of proton exchange membrane fuel cells, leading to metal dissolution. The study found that the rate of voltage decrease is twice as high in the presence of metal ions during high current operations.
Trace-metal contamination poses a threat to performance and stability of proton exchange membrane fuel cells (PEMFCs). In this study the source of origin and degree of metal dissolution from carbon-coated 316L bipolar plates (BPPs) are evaluated after a long-term PEMFC test run under conditions resembling a real-life automotive application. Despite intact carbon-coating, metal dissolution occurs from uncoated oxycarbide stains on the plates? surface. Which correlates with post-mortem detection of chromium, iron and nickel in the membrane electrode assembly. The rate of cell voltage decrease throughout the high current operations is found to be twice as high in the presence of metal ions. Metal dissolution can be correlated with transients in cell voltage during dynamic current load cycling as a result of temporary global fuel starvation. The observed difference in metal dissolution on the anode and cathode BPP indicates weak galvanic coupling between the bipolar plate(s) and the electrode layer(s). ? 2020 The Authors. Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. This is an open access article under the CC BY license (http://creativecommons.org/ licenses/by/4.0/).
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