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

Povzetek

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.

Ključne besede

proton exchange membrane;fuel cell;fault;diagnosis;electrochemical impedance spectroscopy;distribution of relaxation times;reformate;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 621.352.6
COBISS: 68712707 Povezava se bo odprla v novem oknu
ISSN: 1996-1073
Št. ogledov: 326
Št. prenosov: 90
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: protonsko izmenjevalna membrana;gorivna celica;napake;diagnoza;elektrokemična impedančna spektoskopija;porazdelitev časa sprostitve;reformirati;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-18
Letnik: ǂVol. ǂ14
Zvezek: ǂiss. ǂ11
Čas izdaje: Jun. 2021
DOI: 10.3390/en14112994
ID: 13085128