An Analysis of Contact Problems in Solid Oxide Fuel Cell Stacks Arising from Differences in Thermal Expansion Coefficients

2017 ◽  
Vol 223 ◽  
pp. 100-108 ◽  
Author(s):  
Ludger Blum
Keyword(s):  
Thermal Expansion ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Contact Problems ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Thermal Expansion Coefficients ◽  
Expansion Coefficients

The Thermal Expansion of Solid Oxide Fuel Cell (SOFC) Cathode Material-Pr[sub 1−x]Sr[sub x]MnO[sub 3]

2011 ◽  
Author(s):  
Archana Srivastava ◽  
N. K. Gaur ◽  
Alka B. Garg ◽  
R. Mittal ◽  
R. Mukhopadhyay
Keyword(s):  
Thermal Expansion ◽  
Fuel Cell ◽  
Cathode Material ◽  
Solid Oxide Fuel Cell ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Sofc Cathode

Cathode Properties of SmxSr1−x(Co,Fe,Ni)O3−δ/Sm0.2Ce0.8O1.9 Composite Material for Intermediate Temperature-Operating Solid Oxide Fuel Cell

2009 ◽  
Vol 6 (3) ◽  
Author(s):  
Seung-Wook Baek ◽  
Changbo Lee ◽  
Joongmyeon Bae
Keyword(s):  
Composite Material ◽  
Thermal Expansion ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Composite Cathode ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Oxide Fuel ◽  
Cell Components ◽  
Temperature Operating

Perovskite-structured cathode material containing samarium (Sm) has been recognized as a promising electrode material due to its high electrocatalytic property for intermediate temperature-operating solid oxide fuel cell (IT-SOFC). This research investigated the optimized composition of SmxSr1−x(Co,Fe,Ni)O3−δ/Sm0.2Ce0.8O1.9 on the Sm0.2Ce0.8O1.9 electrolyte and the possible use of an optimized composite material for the IT-SOFC system. The electrochemical and thermal properties of SmxSr1−x(Co,Fe,Ni)O3−δ and its composite material with the Sm0.2Ce0.8O1.9 electrolyte were investigated in terms of area specific resistance (ASR) and thermal expansion coefficient at various temperature conditions. Durability of the selected materials was verified by thermal cycling and long-term degradation tests. Sm0.5Sr0.5CoO3−δ and the Sm0.5Sr0.5CoO3−δ/Sm0.2Ce0.8O1.9(6:4) composite cathode showed a very low ASR of 0.87 Ωcm2 and 0.30 Ωcm2 at 600°C, respectively. The composite type cathode for the Sm0.5Sr0.5CoO3−δ material was more attractive due to its thermal expansion compatibility with neighboring cell components.

scholarly journals Thermal expansion and elastic moduli of electrolyte materials for high and intermediate temperature solid oxide fuel cell

2017 ◽  
Vol 300 ◽  
pp. 1-9 ◽  
Author(s):  
Peipei Gao ◽  
Amy Bolon ◽  
Manisha Taneja ◽  
Zhilin Xie ◽  
Nina Orlovskaya ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Elastic Moduli ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Oxide Fuel

scholarly journals Structure and Thermal Behaviour of BSCF-SDC-Ag Composite Cathode for Solid Oxide Fuel Cell

2019 ◽  
Vol 9 (2) ◽  
pp. 1582-1585
Keyword(s):  
Thermal Expansion ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Thermal Expansion Coefficient ◽  
High Speed ◽  
Composite Cathode ◽  
Milling Process ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Ball Milling Technique

Solid oxide fuel cell (SOFC) component has always under development to enhance catalytic activity. Components such as anode, cathode and electrolyte must have better structure and behavior for good SOFC performance. Traditional Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) cathode in solid oxide fuel cell application has been deterred several inappropriate circumstances such as high thermal expansion coefficient (TEC) and chemical instability. Sm0.2Ce0.8O1.9 (SDC) electrolyte and Silver (Ag) are added into BSCF to overcome the problem and has better material characterization and thermal stability, The composite cathode powder BSCF-SDC was prepared by high speed ball milling technique with mixture of 50wt% BSCF and 50wt% SDC commercial powder. The powders were then dried and calcined at 950oC for 2 hour. Silver (Ag) with 1wt%, 3wt% and 5wt% were milled respectively with BSCF-SDC by low speed ball milling technique. The developed composite cathode was then examined by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), dilatometer and Thermogravimetric Analysis (TGA). The vivid distinct phase of BSCF, SDC and Ag and absence of additional secondary phase was confirmed by XRD analysis indicating good phase structure compatibility. This also assured that less chemical reaction was happened during low speed milling process for BSCF-SDC-Ag as minor secondary phases are detected. However, milling process at high speed and high calcination temperature did destruct single phase of BSCF in BSCF-SDC composite cathode. However, Ag obtains its role to retain back the BSCF crystalline phase. The higher the percent of Ag added, the higher the BSCF peak retain. The absence of addition bonding in FTIR analysis demonstrating excellent structure compatibility of BSCF, SDC and Ag during milling process. There was no significant additional bonding appeared in BSCF-SDC-Ag after milling process. The thermal expansion coefficient (TEC) were determined using dilatometer, manifesting closer TEC mismatch between BSCF-SDC-Ag cathode composite and SDC electrolyte compared to BSCF-SDC. TEC is essential to be matched as it could prevent spallation during elevated operation temperature of SOFC. TGA analysis indicated cathode composite experiencing very less changes of weight when it was heated up 1000oC. BSCF is revealed of decomposition occurring after 800oC. Result revealed that Ag exhibited desirable thermal and structure compatibility with BSCF-SDC as promising SOFC cathode which beneficial from medium scale automobile to high scale power plant application.

scholarly journals A computational study of the electronic properties, ionic conduction, and thermal expansion of Sm1−xAxCoO3 and Sm1−xAxCoO3−x/2 (A = Ba2+, Ca2+, Sr2+, and x = 0.25, 0.5) as intermediate temperature SOFC cathodes

2017 ◽  
Vol 19 (21) ◽  
pp. 13960-13969 ◽  
Author(s):  
Emilia Olsson ◽  
Xavier Aparicio-Anglès ◽  
Nora H. de Leeuw
Keyword(s):  
Thermal Expansion ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Electronic Properties ◽  
Ionic Conduction ◽  
Computational Study ◽  
Ionic Conductivities ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Substitutional Doping

Substitutional doping of Ca2+, Sr2+, and Ba2+ on the Sm-site in SmCoO3 is reported to improve both electronic and ionic conductivities for applications as solid oxide fuel cell (SOFC) cathodes.

Modeling of thermal expansion coefficient of perovskite oxide for solid oxide fuel cell cathode

2015 ◽  
Vol 120 (4) ◽  
pp. 1625-1633 ◽  
Author(s):  
F. Heydari ◽  
A. Maghsoudipour ◽  
M. Alizadeh ◽  
Z. Khakpour ◽  
M. Javaheri
Keyword(s):  
Thermal Expansion ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Solid Oxide ◽  
Perovskite Oxide ◽  
Oxide Fuel ◽  
Fuel Cell Cathode ◽  
Cell Cathode
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