scholarly journals Correlative Microscopy in the Laboratory: Analysis of the Triple-Phase Boundary in a Solid-Oxide Fuel Cell Electrode Using X-ray Computed Nanotomography and FIB-SEM

2010 ◽  
Vol 16 (S2) ◽  
pp. 872-873
Author(s):  
PR Shearing ◽  
J Gelb ◽  
NP Brandon
Keyword(s):  
Fuel Cell ◽  
Phase Boundary ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Correlative Microscopy ◽  
Triple Phase Boundary ◽  
X Ray ◽  
Fuel Cell Electrode ◽  
X Ray Computed ◽  
Cell Electrode

Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.

scholarly journals Studying Pt-based fuel cell electrode degradation with nanoscale X-ray computed tomography

2020 ◽  
Vol 478 ◽  
pp. 229049
Author(s):  
Jonathan P. Braaten ◽  
Shohei Ogawa ◽  
Venkata Yarlagadda ◽  
Anusorn Kongkanand ◽  
Shawn Litster
Keyword(s):  
Computed Tomography ◽  
Fuel Cell ◽  
X Ray ◽  
Electrode Degradation ◽  
Fuel Cell Electrode ◽  
X Ray Computed ◽  
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.

scholarly journals A parametric analysis of thermodynamic losses in an anode of a solid oxide fuel cell

2021 ◽  
Vol 2116 (1) ◽  
pp. 012081
Author(s):  
Tomasz Prokop ◽  
Grzegorz Brus ◽  
Shinji Kimijima ◽  
Janusz Szmyd
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Chemical Reaction ◽  
Parametric Analysis ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Micro Channels ◽  
Fuel Cell Electrode ◽  
Current Conduction ◽  
Cell Electrode

Abstract In this paper, generation of thermodynamic losses in the micro-channels of a Solid Oxide Fuel Cell electrode is discussed. Diffusive-convective equation is implemented to compute local concentrations of reagents. The model accounts for both the Fick’s, and the Knudsen’s diffusion. For a number of cases the total losses are decomposed to isolate the contributions of the diffusion, the current conduction, and the chemical reaction irreversibilities.

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