Intermediate temperature fuel cells based on doped ceria-LiCl-SrCl2 composite electrolyte

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 de...

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Bibliographic Details
Published in:Journal of power sources 2002-01, Vol.104 (1), p.73-78
Main Authors: FU, Q. X, ZHA, S. W, ZHANG, W, PENG, D. K, MENG, G. Y, ZHU, B
Format: Article
Language:English
Subjects:
Applied sciences
composite electrolyte
conduction
electrical conductivity
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
GDC-LiCl-SrCl2
intermediate temperature fuel cells
li2so4
nacl
operation
proton
solid electrolytes
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Summary: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.
ISSN:0378-7753
1873-2755
1873-2755
DOI:10.1016/S0378-7753(01)00874-6