Thermal aging stability of infiltrated solid oxide fuel cell electrode microstructures: A three-dimensional kinetic Monte Carlo simulation

2015 ◽  
Vol 299 ◽  
pp. 578-586 ◽  
Author(s):  
Yanxiang Zhang ◽  
Meng Ni ◽  
Mufu Yan ◽  
Fanglin Chen
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Fuel Cell ◽  
Thermal Aging ◽  
Kinetic Monte Carlo ◽  
Three Dimensional ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Cell Electrode ◽  
Cell Electrode

scholarly journals Monte Carlo Investigation of Particle Properties Affecting TPB Formation and Conductivity in Composite Solid Oxide Fuel Cell Electrode-Electrolyte Interfaces

2011 ◽  
Vol 8 (5) ◽  
Author(s):  
Andrew Martinez ◽  
Jacob Brouwer
Keyword(s):  
Particle Size ◽  
Monte Carlo ◽  
Fuel Cell ◽  
Phase Contrast ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Particle Properties ◽  
Fuel Cell Electrode ◽  
Cell Electrode

A previously developed microstructure model of a solid oxide fuel cell (SOFC) electrode-electrolyte interface has been applied to study the impacts of particle properties on these interfaces through the use of a Monte Carlo simulation method. Previous findings that have demonstrated the need to account for gaseous phase percolation have been confirmed through the current investigation. In particular, the effects of three-phase percolation critically affect the dependence of TPB formation and electrode conductivity on (1) conducting phase particle size distributions, (2) electronic:ionic conduction phase contrast, and (3) the amount of mixed electronic-ionic conductor (MEIC) included in the electrode. In particular, the role of differing percolation effectiveness between electronic and ionic phases has been shown to counteract and influence the role of the phase contrast. Porosity, however, has been found to not be a significant factor for active TPB formation in the range studied, but does not obviate the need for modeling the gas phase. In addition, the current work has investigated the inconsistencies in experimental literature results concerning the optimal particle size distribution. It has been found that utilizing smaller particles with a narrow size distribution is the preferable situation for electrode-electrolyte interface manufacturing. These findings stress the property-function relationships of fuel cell electrode materials.

Microstructure and Connectivity Quantification of Complex Composite Solid Oxide Fuel Cell Electrode Three-Dimensional Networks

2010 ◽  
Vol 94 (2) ◽  
pp. 620-627 ◽  
Author(s):  
Danijel Gostovic ◽  
Nicholas J. Vito ◽  
Kathryn A. O'Hara ◽  
Kevin S. Jones ◽  
Eric D. Wachsman
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Three Dimensional ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Cell Electrode ◽  
Cell Electrode ◽  
Composite Solid

scholarly journals Adaptive kinetic Monte Carlo simulation of solid oxide fuel cell components

2014 ◽  
Vol 2 (33) ◽  
pp. 13407-13414 ◽  
Author(s):  
David S. D. Gunn ◽  
Neil L. Allan ◽  
John A. Purton
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Cathode Materials ◽  
Kinetic Monte Carlo ◽  
Ionic Conductivities ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Cell Components

Millisecond length simulations have been performed to directly calculate accurate ionic conductivities in solid oxide fuel cell (SOFC) electrolyte and cathode materials using adaptive kinetic Monte Carlo (aKMC).

Three-Dimensional Analysis of Solid Oxide Fuel Cell Ni-YSZ Anode Interconnectivity

2009 ◽  
Vol 15 (1) ◽  
pp. 71-77 ◽  
Author(s):  
James R. Wilson ◽  
Marcio Gameiro ◽  
Konstantin Mischaikow ◽  
William Kalies ◽  
Peter W. Voorhees ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Three Dimensional ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Electrochemically Active ◽  
Fuel Cell Electrode ◽  
Cell Electrode

AbstractA method is described for quantitatively analyzing the level of interconnectivity of solid-oxide fuel cell electrode phases. The method was applied to the three-dimensional microstructure of a Ni–Y2O3-stabilized ZrO2 (Ni-YSZ) anode active layer measured by focused ion beam scanning electron microscopy. Each individual contiguous network of Ni, YSZ, and porosity was identified and labeled according to whether it was contiguous with the rest of the electrode. It was determined that the YSZ phase was 100% connected, whereas at least 86% of the Ni and 96% of the pores were connected. Triple-phase boundary (TPB) segments were identified and evaluated with respect to the contiguity of each of the three phases at their locations. It was found that 11.6% of the TPB length was on one or more isolated phases and hence was not electrochemically active.

scholarly journals Monte Carlo Investigation of Particle Properties Affecting TPB Formation and Conductivity in Composite Solid Oxide Fuel Cell Electrode-Electrolyte Interfaces

2009 ◽  
Author(s):  
Andrew Martinez ◽  
Jacob Brouwer
Keyword(s):  
Particle Size ◽  
Monte Carlo ◽  
Fuel Cell ◽  
Phase Contrast ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Particle Properties ◽  
Fuel Cell Electrode ◽  
Cell Electrode

A previously-developed microstructure model of the Solid Oxide Fuel Cell (SOFC) electrode-electrolyte interface has been applied to the study of particle properties in these devices through the use of the Monte Carlo simulation method. Previous findings that have demonstrated the necessity of accounting for the gaseous phase percolation have been re-emphasized through the current investigation. In particular, the effects of three-phase percolation critically affect the dependence of TPB formation and electrode conductivity on: 1) conducting phase particle size distributions, 2) electronic:ionic conduction phase contrast, and 3) the amount of Mixed Electronic-Ionic Conductor (MEIC) included in the electrode. In particular, the role of differing percolation effectiveness between electronic and ionic phases has been shown to counteract and influence the role of the phase contrast. Porosity, however, has been found to not be a significant factor for the range studied, but does not obviate the necessity of modeling the gas phase. In addition, the current work has investigated the inconsistencies in experimental literature results concerning the optimal particle size distribution. It has been found that utilizing smaller particles with a narrow size distribution is the preferable situation for electrode manufacturing. These findings stress the property-function relationships of fuel cell electrode materials.

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