Abstract
Ni-(3,5) wt.% Al-(3-10) wt.% Cr alloys suitable for use as an anode material for molten carbonate fuel cells (MCFCs) were prepared by a solid-gas-solid diffusion method. The creep resistances and sintering resistances of the prepared Ni-Al-Cr alloy samples evaluated in the creep test system were significantly improved with increasing Al and Cr concentration. The Ni-5 wt.% Al-10 wt.% Cr alloy showed the best creep resistance with a creep strain of 1.7% among as-prepared samples. To determine the electrochemical performance of the Ni-Al-Cr alloy anode, a single cell test was carried out. The cell performances of all the Ni-Al-Cr alloy anodes were above 0.8 V at 150 mA cm -2 for 1000 h of operation. It was also verified that the addition of Cr to Ni-Al enhances the ductility of the alloy and thus reduces micro-crack formation in the Ni-Al-Cr anode during cell operation. Therefore, it can be concluded that the Ni-Al-Cr alloy anode is a good candidate anode material for MCFCs.
| Original language | English |
|---|---|
| Pages (from-to) | 910-916 |
| Number of pages | 7 |
| Journal | Materials Chemistry and Physics |
| Volume | 136 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - 2012 Oct 15 |
Bibliographical note
Funding Information:This work was financially supported by the Global Research Laboratory Program funded by the Ministry of Education, Science and Technology of Korea , and the Korea Research Foundation Grant funded by the Korean Government ( KRF-2008-211-D00017 ).
Keywords
- Creep
- Ductility
- Electrochemical properties
- Mechanical properties
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics