Results 221 to 230 of about 18,191 (257)
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Geometrical modeling of the triple-phase-boundary in solid oxide fuel cells
Journal of Power Sources, 2005A geometrical model was developed to predict the influences of solid grain size, pore size and porosity on the triple-phase-boundary (TPB) length in electronic composite electrodes of solid oxide fuel cells. It shows that the TPB length is inversely proportional to grain size and can be optimized by the pore size and porosity.
Anthony Petric
exaly +2 more sources
On the accuracy of triple phase boundary lengths calculated from tomographic image data
Journal of Power Sources, 2014Abstract The triple phase boundary (TPB) length is one of the most important quantities obtainable from three dimensional reconstructions of solid oxide fuel cells that utilize porous composite electrodes. However, the choice of TPB calculation method and the voxelation of the microstructures can lead to systematic errors in TPB estimates.
Scott Barnett, Jacob R Bowen
exaly +2 more sources
ReaxFF Reactive Force-Field Modeling of the Triple-Phase Boundary in a Solid Oxide Fuel Cell
Journal of Physical Chemistry Letters, 2014In our study, the Ni/YSZ ReaxFF reactive force field was developed by combining the YSZ and Ni/C/H descriptions. ReaxFF reactive molecular dynamics (RMD) were applied to model chemical reactions, diffusion, and other physicochemical processes at the fuel/Ni/YSZ interface.
Jonathan Mueller +2 more
exaly +3 more sources
Triple Phase Boundaries in Solid-Oxide Cathodes
SIAM Journal on Applied Mathematics, 2009Component potential modeling based on solid-oxide electrochemistry is used to study a single-particle configuration where a hemispherical LSM particle sits on a YSZ electrolyte half-space. The primary comparison is between two pathways: one where oxide ions travel on the particle surface; the other where these ions travel through the bulk particle ...
Joseph D. Fehribach, Ryan O'Hayre
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Spontaneous Particle Transport through a Triple-Fluid Phase Boundary
Langmuir, 2013We investigate the spontaneous transport of a single particle through an air-water-oil triple phase boundary that is formed by placing a thin oil lens at an air-water interface. We find two distinct transition regimes: a particle initially accelerates upon its adsorption to the air-water-oil triple phase boundary from the air-water interface ...
Bum Jun, Park, Daeyeon, Lee
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Novel method for determining the triple phase boundary width
Solid State Ionics, 2016Abstract In order to improve the performance of solid oxide fuel cells (SOFCs), there is a need to deepen our understanding of the cathode reactions, which is rate-limiting. The purpose of this work is to develop and demonstrate a direct electrochemical technique for estimating the cathode triple-phase boundary (TPB) between electrode, electrolyte ...
Tzvia Beitner +3 more
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(Invited) Triple Phase Boundary Reaction in a Mixed-Conducting SOFC Cathode
ECS Meeting Abstracts, 2017Solid oxide fuel cells (SOFCs) attract attentions as high-efficiency energy-conversion devices. In order to establish high-performance SOFCs, the slow electrode kinetics, which is often a main cause of the energy loss, should be improved. In present SOFCs, mixed ionic-electronic conducting (MIEC) oxides, such as (La,Sr)CoO3 -δ
Koji Amezawa +10 more
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Direct Observation of Nanoscale Pt Electrode Agglomeration at the Triple Phase Boundary
ACS Applied Materials & Interfaces, 2015Nanoporous platinum electrode thin films were delaminated from yttria-stabilized zirconia (YSZ) substrates via double cantilever beam delamination to reveal the structure located at the interface between electrode and electrolyte. The thermally driven morphological evolution between the electrode top surface and the substrate contact interface of ...
Yu, CC Yu, Chen-Chiang +5 more
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Reaction Kinetics at the Triple-Phase Boundary in PEM Fuel Cells
Journal of Fuel Cell Science and Technology, 2008A mathematical model is developed to describe the reaction dynamics in the vicinity of the triple-phase boundary (TPB), which is an important part of the pore scale structure of the catalyst layer in proton exchange membrane fuel cells. The model incorporates coupled diffusion, migration, and reaction phenomena of the chemical components in an ...
P. Berg, A. Novruzi, O. Volkov
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Wetting of grain boundary triple junctions by intermetallic delta-phase in the Cu–In alloys
Journal of Materials Science, 2021The paper studies the wetting of grain boundary triple junctions (GB TJs) by the second solid phase (intermetallic) δ in the Cu–In alloys. In this system, the portion of grain boundaries in a copper-based solid solution (Cu), which are "wetted" by the second solid phase δ, changes non-monotonically with increasing temperature.
Boris Straumal +6 more
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