Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5147916 | International Journal of Hydrogen Energy | 2017 | 10 Pages |
Abstract
The durabilities of a single solid oxide electrolysis cell (SOEC) and a solid oxide fuel cell (SOFC) operating at 0.3Â AÂ cmâ2 and 973Â K under different air supply conditions were investigated. In the SOEC, S penetration was observed mainly at the gadolinium-doped ceria (CGO) electrolyte/lanthanum strontium cobalt oxide (LSC) oxygen electrode interface. In contrast, during SOFC operation, S was distributed widely within the LSC. The reaction governing S penetration into the LSC is an oxidizing one. Thus, it is likely that the high oxygen partial pressure at the CGO electrolyte/LSC oxygen electrode interface accelerated the penetration of S. When air was supplied using an activated carbon filter during SOEC operation, the degradation rate decreased to 0.6%Â khâ1 within 3000Â h. Finally, the results of accelerated tests performed using air containing 0.2Â ppm SO2 suggested that the effect of S poisoning was greater during SOEC operation than during SOFC operation.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Takuto Kushi,