Intermediate Temperature Fuel Cells Based on Doped Ceria-LiCl-SrCl sub(2) Composite Electrolyte

• Published in: Journal of power sources Vol. 104; no. 1; p. 73
• Main Authors: Fu, Q X, Zha, S W, Zhang, W, Peng, D K, Meng, G Y, Zhu, B
• Format: Journal Article
• Language: English
• Published: 15.01.2002
• ISSN: 0378-7753

A new type of oxide-salt composite electrolyte, gadolinium-doped ceria (GDC)-LiCl-SrCl sub(2), was developed and demonstrated its promising use for intermediate temperature (400-700 degree C) fuel cells (ITFCs). The dc electrical conductivity of this composite electrolyte (0.09-0.13Scm super(-1) at 500-650 degree C) was 3-10 times higher than that of the pure GDC electrolyte, indicating remarkable proton or oxygen ion conduction existing in the LiCl-SrCl sub(2) chloride salts or at the interface between GDC and the chloride salts. Using this composite electrolyte, peak power densities of 260 and 510mWcm super(-2), with current densities of 650 and 1250mAcm super(-2) were achieved at 550 and 625 degree C, respectively. This makes the new material a good candidate electrolyte for future low-cost ITFCs. copyright 2002 Elsevier Science B.V. All rights reserved.