Performance of solid oxide fuel cells approaching the two-dimensional limit

2014 ◽  
Vol 115 (17) ◽  
pp. 174307 ◽  
Author(s):  
K. Kerman ◽  
S. Ramanathan
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Two Dimensional

scholarly journals Extraction of Quantitative Parameters for Describing the Microstructure of Solid Oxide Fuel Cells

2013 ◽  
Vol 19 (S5) ◽  
pp. 140-144 ◽  
Author(s):  
Seung-Muk Bae ◽  
Yong-Hoon Kim ◽  
Yil-Hwan You ◽  
Jin-Ha Hwang
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Size Distribution ◽  
Volume Fraction ◽  
Composite Cathode ◽  
Solid Oxide ◽  
Dimensional Structure ◽  
Oxide Fuel ◽  
Two Dimensional ◽  
Fraction Size

AbstractDigital quantification of a two-dimensional structure was applied to a GDC(Gd2O3-doped CeO2)/LSM(La0.85Sr0.15MnO3) composite cathode employed for solid oxide fuel cells. With the aid of high-resolution imaging capability based on secondary and backscattered electron images, two-dimensional electron micrographs were converted to digital binary files using an image processing tool combined with the line intercept method. Statistical analysis combined with a metallurgical tool was employed to determine microstructural factors, i.e., volume fraction, size distribution, and interconnectivity. The current work reports the quantification of the two-dimensional structural images of GDC/LSM composites applicable to solid oxide fuel cells, with the aim of obtaining the volume fraction, size distribution, and interconnectivity as functions of composite composition. The volume fractions of the solid constituent phases exhibit compositional dependence in cathodes; however, LSM interconnectivity increases gradually as a function of LSM composition, whereas that of GDC decreases significantly at 50 wt% LSM.

Performance of Two-Dimensional Functionally Graded Anode Supported Solid-Oxide Fuel Cells

2021 ◽  
Author(s):  
Sameer Osman ◽  
Khaled Ahmed ◽  
Mahmoud Ahmed
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Solid Oxide Fuel Cells ◽  
Power Density ◽  
Thermal Stresses ◽  
Functionally Graded ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Maximum Power Density ◽  
Two Dimensional

Abstract High-temperature ceramic materials used in solid-oxide fuel cells (SOFCs) are subject to high thermal stresses during operation due to the unequal thermal expansion between different layers. As a result, solid oxide fuel cells are prone to mechanical failure at elevated temperatures, limiting the maximum operating temperature and, therefore, limiting the maximum power density obtained from the fuel cell. Fuel cells with graded electrodes in the thickness direction have been used and extensively investigated to reduce the effect of non-uniform thermal expansion. In this study, two dimensional functionally graded electrodes are proposed for the first time. Thus, a comprehensive theoretical model is developed for a high-temperature SOFCs that includes the charge, species, energy, and momentum transport equations. Also, the bilinear elastoplastic material model is used to calculate thermal stresses and failure in solid materials. The model is used to study two-dimensional functionally graded electrodes introduced to investigate their effect on thermal stresses. The material grading will be implemented in two directions for each layer; thickness and length. Results indicate that using the two-dimensional grading reduced thermal stresses by over 40 % for a specific grading scheme compared to the conventional case. Grading the electrodes also positively affects the electrochemical performance, as the cell’s maximum power density was increased by over 60 %. These results prove that two-dimensional graded SOFCs can achieve much higher operating temperatures with safe thermal stresses, creating a potential for compact, high-temperature SOFCs designed for high power density applications.

Effect of an Anode Functional Layer on Cell Performance of Anode-Supported Solid Oxide Fuel Cells by a Decalcomania Method

2013 ◽  
Vol 51 (2) ◽  
pp. 125-130 ◽  
Author(s):  
Sun-Min Park ◽  
Hae-Ran Cho ◽  
Byung-Hyun Choi ◽  
Yong-Tae An ◽  
Ja-Bin Koo ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Cell Performance ◽  
Oxide Fuel ◽  
Functional Layer

Optimization Rule of Anode Materials for Solid Oxide Fuel Cells

2015 ◽  
Vol 30 (10) ◽  
pp. 1043
Author(s):  
CHANG Xi-Wang ◽  
CHEN Ning ◽  
WANG Li-Jun ◽  
BIAN Liu-Zhen ◽  
LI Fu-Shen ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Anode Materials ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Optimization Rule
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