Electrochemical assessment of contact pressure effects on durability of high-temperature proton exchange membrane fuel cells under dynamic operation

Filip Todorovski (Avtor), Emilija Dejanoska (Avtor), Mihael Sekavčnik (Avtor), Mitja Mori (Avtor), Andrej Lotrič (Avtor)

Povzetek

This study examines the impact of nominal contact pressure on the electrochemical performance and degradation behaviour of high-temperature proton exchange membrane fuel cells (HT-PEMFCs) with pre-doped polybenzimidazole (p-PBI) membranes, focusing primarily on start-stop cycling durability. Three nominal contact pressures—0.30 MPa, 0.55 MPa, and 0.85 MPa—were applied during 70-cycle start-stop tests. Performance evolution was assessed using polarization curves, electrochemical impedance spectroscopy (EIS), distribution of relaxation times (DRT), and spatial current density mapping.

Ključne besede

high-temperature PEM fuel cell;start-stop cycling protocol;nominal contact pressure;electrochemical impedance spectroscopy;distribution of relaxation times;

Podatki

Jezik:	Angleški jezik
Leto izida:	2025
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FS - Fakulteta za strojništvo
UDK:	621.352.6:543.429.3
COBISS:	247259395
ISSN:	0013-4686
Št. ogledov:	61
Št. prenosov:	49
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	visokotemperaturne PEM gorivne celice;protokol start-stop ciklanja;nominalni kontaktni tlak;elektrokemična impedančna spektroskopija;distribucija relaksacijskih časov;
Vrsta dela (COBISS):	Članek v reviji
Strani:	str. 1-18
Zvezek:	ǂVol. ǂ540, [article no.] 147254
Čas izdaje:	Nov. 2025
DOI:	10.1016/j.electacta.2025.147254
ID:	27225015