Intermediate temperature fuel cells based on doped ceria-LiCl-SrCl2 composite electrolyte
2002 (English)In: Journal of Power Sources, ISSN 0378-7753, Vol. 104, no 1, 73-78 p.Article in journal (Refereed) Published
A new type of oxide-salt composite electrolyte, gadolinium-doped ceria (GDC)-LiCl-SrCl2, was developed and demonstrated its promising use for intermediate temperature (400-700 degreesC) fuel cells (ITFCs). The dc electrical conductivity of this composite electrolyte (0.09-0.13 S cm(-1) at 500-650 degreesC) was 3-10 times higher than that of the pure GDC electrolyte, indicating remarkable proton or oxygen ion conduction existing in the LiCl-SrCl2 chloride salts or at the interface between GDC and the chloride salts. Using this composite electrolyte, peak power densities of 260 and 510 mW cm(-2), with current densities of 650 and 1250 mA cm(-2) were achieved at 550 and 625 degreesC, respectively. This makes the new material a good candidate electrolyte for future low-cost ITFCs.
Place, publisher, year, edition, pages
2002. Vol. 104, no 1, 73-78 p.
GDC-LiCl-SrCl2, composite electrolyte, intermediate temperature fuel cells, electrical conductivity, solid electrolytes, conduction, proton, operation, li2so4, nacl
IdentifiersURN: urn:nbn:se:kth:diva-21280ISI: 000173548300011OAI: oai:DiVA.org:kth-21280DiVA: diva2:339978
QC 201005252010-08-102010-08-10Bibliographically approved