Mystery in solid oxide fuel cells
Posted by a blog reader on Tue 5 Feb 2008Categories: Reader's posts | 1 Comment
Using SDC (Samaria doped Ceria) electrolytes, the OCV (open circuit voltage) is only 0.8 V and lower than Nernst voltage 1.15V at 1073K. Low OCV has been explained by the theory of transport equations. Even if there is no external current,there are internal ionic (Ii) and electronic currents (Ie). Here, the sum of Ii and Ie is zero. By ohmic loss caused by Ii, OCV becomes lower than Nernst voltage. But no one can measure internal currents, even the predicted currents are over several A and they are too large.
Posted on behalf of T. Miyashita. If anyone can help, I think he/she is having trouble with their fuel cell …
Thu 7 Feb 2008 at 7:50 am
please read next report.
“Necessity of verification of leakage currents using Sm doped Ceria electrolytes in SOFCs”
T. Miyashita, J. Mater. Sci., 41, p.3183 (2006).
http://springerlink.metapress.com/content/1777121921147t22/?p=1d503851d27a4dc1ae69856851808c04&pi=63
I want someone to clarfy this result.