Parametric study on interfacial crack propagation in solid oxide fuel cell based on electrode material

Author(s):  
Jiamiao Xie ◽  
Wenqian Hao ◽  
Fenghui Wang
2005 ◽  
Vol 2 (4) ◽  
pp. 219-225 ◽  
Author(s):  
C. H. Cheng ◽  
Y. W. Chang ◽  
C. W. Hong

This paper conducts a multiscale parametric study of temperature and composition effects on the transport phenomenon of a solid oxide fuel cell (SOFC). The molecular dynamics technique was employed to study the transport phenomenon of the solid electrolyte, which is made of yttria-stabilized zirconia. The influences of Y2O3 concentration and various operation temperatures on the SOFC were studied. Simulation results show that there exists an optimal concentration of 8mol% of Y2O3 in the composition for oxygen transport. Also higher operation temperature promotes the oxygen ion-hopping process that increases the ionic conductivity. A macroscale parametric study was also conducted in this paper to validate the influence of the temperature uniformity in the solid electrolyte by employing the computational fluid dynamics technique. The temperature distribution maps of a single-cell planar SOFC with coflow, counterflow and cross-flow channel designs are presented. The results conclude that the coflow configuration is the best design of the three.


2017 ◽  
Vol 31 (27) ◽  
pp. 1750193 ◽  
Author(s):  
Ghazanfar Abbas ◽  
Rizwan Raza ◽  
M. Ashfaq Ahmad ◽  
M. Ajmal Khan ◽  
M. Jafar Hussain ◽  
...  

Zinc-based nanostructured nickel (Ni) free metal oxide electrode material Zn[Formula: see text]/Cu[Formula: see text]Mn[Formula: see text] oxide (CMZO) was synthesized by solid state reaction and investigated for low temperature solid oxide fuel cell (LTSOFC) applications. The crystal structure and surface morphology of the synthesized electrode material were examined by XRD and SEM techniques respectively. The particle size of ZnO phase estimated by Scherer’s equation was 31.50 nm. The maximum electrical conductivity was found to be 12.567 S/cm and 5.846 S/cm in hydrogen and air atmosphere, respectively at 600[Formula: see text]C. The activation energy of the CMZO material was also calculated from the DC conductivity data using Arrhenius plots and it was found to be 0.060 and 0.075 eV in hydrogen and air atmosphere, respectively. The CMZO electrode-based fuel cell was tested using carbonated samarium doped ceria composite (NSDC) electrolyte. The three layers 13 mm in diameter and 1 mm thickness of the symmetric fuel cell were fabricated by dry pressing. The maximum power density of 728.86 mW/cm2 was measured at 550[Formula: see text]C.


2019 ◽  
Vol 44 (59) ◽  
pp. 31333-31341 ◽  
Author(s):  
Peiyao Li ◽  
Nanqi Duan ◽  
Jiyang Ma ◽  
Lichao Jia ◽  
Bo Chi ◽  
...  

Author(s):  
Alexandros Arsalis ◽  
Michael R. von Spakovsky ◽  
Francesco Calise

Detailed thermodynamic, kinetic, geometric, and cost models are developed, implemented, and validated for the synthesis/design and operational analysis of hybrid solid oxide fuel cell (SOFC)-gas turbine-steam turbine systems ranging in size from 1.5MWeto10MWe. The fuel cell model used in this research work is based on a tubular Siemens-Westinghouse-type SOFC, which is integrated with a gas turbine and a heat recovery steam generator (HRSG) integrated in turn with a steam turbine cycle. The current work considers the possible benefits of using the exhaust gases in a HRSG in order to produce steam, which drives a steam turbine for additional power output. Four different steam turbine cycles are considered in this research work: a single-pressure, a dual-pressure, a triple-pressure, and a triple-pressure with reheat. The models have been developed to function both at design (full load) and off-design (partial load) conditions. In addition, different solid oxide fuel cell sizes are examined to assure a proper selection of SOFC size based on efficiency or cost. The thermoeconomic analysis includes cost functions developed specifically for the different system and component sizes (capacities) analyzed. A parametric study is used to determine the most viable system/component syntheses/designs based on maximizing the total system efficiency or minimizing the total system life cycle cost.


Fuel Cells ◽  
2014 ◽  
Vol 14 (2) ◽  
pp. 189-199 ◽  
Author(s):  
K. Daneshvar ◽  
G. Dotelli ◽  
C. Cristiani ◽  
R. Pelosato ◽  
M. Santarelli

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