Repozytorium publikacji - Politechnika Gdańska

A dual surface modification of an SOFC metallic interconnect with a Gd2O3 layer and an MnCo2O4 coating was evaluated. The tested samples were oxidized for 7000 h in air at 1073 K. Oxidation products were characterized using XRD, SEM-EDS, and confocal Raman imaging, and ASR was measured. The effect of gadolinium segregation at grain boundaries in Cr2O3 was evaluated using S/TEM-EDS. Area specific-resistance was measured and fuel cell tests investigating electrochemical performance and Cr contamination of electrodes were also performed. The results show that the proposed dual modification was more advantageous than either modification applied separately. The fuel cell tests performed after aging in humidified hydrogen at 1073 K and involving an actual interconnect made of this dual-modified material showed that after 250 h of aging its electrochemical parameters were nearly identical to those of the non-aged reference electrode. Moreover, the modification protected the electrodes from Cr poisoning.

Autorzy

• Łukasz Mazur,
• mgr inż. Justyna Ignaczak link otwiera się w nowej karcie ,
• Maciej Bik,
• dr hab. inż. Sebastian Molin link otwiera się w nowej karcie ,
• Maciej Sitarz,
• Aleksander Gil,
• Tomasz Brylewski