Modelling of cells, stacks and systems based around metal-supported planar IT-SOFC cells with CGO electrolytes operating at 500-600°C

被引:170
作者
Leah, RT
Brandon, NP
Aguiar, P
机构
[1] Ceres Power Ltd, Unit 18, Crawley RH10 1SS, England
[2] Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn & Chem Technol, London SW7 2AZ, England
关键词
metal-supported IT-SOFC; CGO; modelling; system efficiency; electronic leakage current;
D O I
10.1016/j.jpowsour.2004.12.067
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Ceres Power Ltd. has developed a novel solid oxide fuel cell (SOFC) concept based upon depositing a thick film positive-electrolyte-negative (PEN) structure on a porous stainless steel substrate, and using gadolinia-doped ceria (CGO) as the electrolyte material. This approach allows the temperature of operation to be reduced to below 600 degrees C, well below the conventional SOFC operating temperature. Historically, the use of CGO as an electrolyte material has been viewed as impractical because of its poor stability in reducing atmospheres at elevated temperatures, leading to electronic conductivity, which effectively short-circuits the cell leading to a loss of efficiency. In this work, a model is developed which accurately simulates the polarisation behaviour of a Ceres cell including electronic leakage. The parameters of this model are set to give the best possible fit to experimental data. This cell model is then incorporated into a model of a 2.5 kW(e) stack, and the stack model into a natural gas fuelled combined heat and power (CHP) system model. The system model demonstrates that high operating efficiencies are achievable for such a system based upon IT-SOFC cells with CGO electrolytes. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:336 / 352
页数:17
相关论文
共 11 条
[1]   Anode-supported intermediate temperature direct internal reforming solid oxide fuel cell. I: model-based steady-state performance [J].
Aguiar, P ;
Adjiman, CS ;
Brandon, NP .
JOURNAL OF POWER SOURCES, 2004, 138 (1-2) :120-136
[2]   Spinning-out a fuel cell company from a UK University - 2 years of progress at Ceres Power [J].
Bance, P ;
Brandon, NP ;
Girvan, B ;
Holbeche, P ;
O'Dea, S ;
Steele, BCH .
JOURNAL OF POWER SOURCES, 2004, 131 (1-2) :86-90
[3]   Development of metal supported solid oxide fuel cells for operation at 500-600 °C [J].
Brandon, NP ;
Corcoran, D ;
Cummins, D ;
Duckett, A ;
El-Khoury, K ;
Haigh, D ;
Leah, R ;
Lewis, G ;
Maynard, N ;
McColm, T ;
Trezona, R ;
Selcuk, A ;
Schmidt, M .
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2004, 13 (03) :253-256
[4]   A complete polarization model of a solid oxide fuel cell and its sensitivity to the change of cell component thickness [J].
Chan, SH ;
Khor, KA ;
Xia, ZT .
JOURNAL OF POWER SOURCES, 2001, 93 (1-2) :130-140
[5]   Polarization effects in intermediate temperature, anode-supported solid oxide fuel cells [J].
Kim, JW ;
Virkar, AV ;
Fung, KZ ;
Mehta, K ;
Singhal, SC .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (01) :69-78
[6]  
*PROC SYST ENT LT, 2004, GPROMS 2 3 1 INTR US
[8]  
Sahibzada M, 1997, ELEC SOC S, V97, P244
[9]   Materials for IT-SOFC stacks 35 years R&D: the inevitability of gradualness? [J].
Steele, BCH .
SOLID STATE IONICS, 2000, 134 (1-2) :3-20
[10]   Appraisal of Ce1-yGdyO2-y/2 electrolytes for IT-SOFC operation at 500°C [J].
Steele, BCH .
SOLID STATE IONICS, 2000, 129 (1-4) :95-110