Effects of impurities on pre-doped and post-doped membranes for high temperature PEM fuel cell stacks

Araya, Samuel Simon (avtor), Thomas, Sobi (avtor), Lotrič, Andrej (avtor), Sahlin, Simon Lennart (avtor), Liso, Vincenzo (avtor), Andreasen, Søren J. (avtor)

In this paper, we experimentally investigated two high temperature polymer electrolyte membrane fuel cell (HT-PEMFC) stacks for their response to the presence of reformate impurities in an anode gas stream. The investigation was aimed at characterizing the effects of reformate impurities at the stack level, including in humidified conditions and identifying fault features for diagnosis purposes. Two HT-PEMFC stacks of 37 cells each with active areas of 165 cm2 were used with one stack containing a pre-doped membrane with a woven gas diffusion layer (GDL) and the other containing a post-doped membrane with non-woven GDL. Polarization curves and galvanostatic electrochemical impedance spectroscopy (EIS) were used for characterization. We found that both N2 dilution and impurities in the anode feed affected mainly the charge transfer losses, especially on the anode side. We also found that humidification alleviated the poisoning effects of the impurities in the stack with pre-doped membrane electrode assemblies (MEA) and woven GDL but had detrimental effects on the stack with post-doped MEAs and non-woven GDL. We demonstrated that pure and dry hydrogen operation at the end of the tests resulted in significant recovery of the performance losses due to impurities for both stacks even after the humidified reformate operation. This implies that there was only limited acid loss during the test period of around 150 h for each stack.

• Jezik: Angleški jezik
• Ključne besede: proton exchange membrane, fuel cell, fault, diagnosis, electrochemical impedance spectroscopy, distribution of relaxation times, reformate
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: Str. 1-18
• Številčenje: Vol. 14, iss. 11, art. 2994
• PID: 20.500.12556/RUL-127982
• UDK: 621.352.6
• ISSN pri članku: 1996-1073
• DOI: 10.3390/en14112994
• COBISS.SI-ID: 68712707
• Datum objave v RUL: 30.06.2021

Gradivo je del revije

• Naslov: Energies
• Skrajšan naslov: Energies
• Založnik: Molecular Diversity Preservation International
• ISSN: 1996-1073
• COBISS.SI-ID: 518046745

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 21.05.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: protonsko izmenjevalna membrana, gorivna celica, napake, diagnoza, elektrokemična impedančna spektoskopija, porazdelitev časa sprostitve, reformirati

Projekti

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: Danish Energy Technology Development and Demonstration Program (EUDP)
• Številka projekta: 64018-0118
• Naslov: COmmercial BReakthrough of Advanced Feuel Cells
• Akronim: COBRA Drive

• Financer: EC - European Commission
• Program financ.: H2020
• Številka projekta: 893919
• Naslov: Advanced Single Cell tEstiNg and Development of HT PEMFCs
• Akronim: ASCEND