Analysis of multiphase tranport phenomena in PEMFCs by incorporating microscopic model for catalyst layer structure
(2011) ASME International Mechanical Engineering Congress and Exposition (IMECE), 2011- Abstract
- The catalyst layer (CL) in polymer electrolyte membrane
(PEM) fuel cells is one of the key components regulating the
overall performance of the cell. In PEM fuel cells, there are two
CLs having identical composition for hydrogen oxidation (HO)
and oxygen reduction (OR) reactions. There are four phases inside
the CL, namely: carbon, Pt particles, ionomer and voids.
In this work, a micro-model of the cathode CL has been developed
mathematically using finite volume (FV) technique to reconstruct
the local structure and further investigate the transport
phenomena of reactants and product species, ions and electrons
by incorporating the above stated phases... (More) - The catalyst layer (CL) in polymer electrolyte membrane
(PEM) fuel cells is one of the key components regulating the
overall performance of the cell. In PEM fuel cells, there are two
CLs having identical composition for hydrogen oxidation (HO)
and oxygen reduction (OR) reactions. There are four phases inside
the CL, namely: carbon, Pt particles, ionomer and voids.
In this work, a micro-model of the cathode CL has been developed
mathematically using finite volume (FV) technique to reconstruct
the local structure and further investigate the transport
phenomena of reactants and product species, ions and electrons
by incorporating the above stated phases at the cathode
side only, due to the fact that the OR reactions are the rate limiting
as compared to HO reaction. The 3D CL has been reconstructed
based on a regularly distributed sphere’s method with
dimensions 4:14:14:1 μm3. Platinum particles combined
with carbon spheres (C/Pt) are regularly placed in the domain,
an ionomer layer of a given thickness is extruded from the sphere
surfaces. The C/Pt, ionomer and void distribution, as well as
Address all correspondence to this author. (munir.khan@energy.lth.se)
the triple phase boundary (TPB) are analysed and discussed. A
microscopic model has been developed for water generation and
species transport including Knudsen diffusion through the voids
and the proton transport in the ionomer has been included here
to aim for the rigorousness of the work. In addition, the electrochemical
reactions have been simulated on the surface of Pt particles
fulfilling the TBP conditions. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2205924
- author
- Khan, Munir LU ; Xiao, Yexiang LU ; Sundén, Bengt LU and Yuan, Jinliang LU
- organization
- publishing date
- 2011
- type
- Contribution to conference
- publication status
- published
- subject
- conference name
- ASME International Mechanical Engineering Congress and Exposition (IMECE), 2011
- conference location
- Denver, CO, United States
- conference dates
- 2011-11-11 - 2011-11-17
- language
- English
- LU publication?
- yes
- id
- 7d1cedf7-db95-4979-9eef-90cc25a9c54f (old id 2205924)
- date added to LUP
- 2016-04-04 13:51:08
- date last changed
- 2018-11-21 21:16:43
@misc{7d1cedf7-db95-4979-9eef-90cc25a9c54f,
abstract = {{The catalyst layer (CL) in polymer electrolyte membrane<br/><br>
(PEM) fuel cells is one of the key components regulating the<br/><br>
overall performance of the cell. In PEM fuel cells, there are two<br/><br>
CLs having identical composition for hydrogen oxidation (HO)<br/><br>
and oxygen reduction (OR) reactions. There are four phases inside<br/><br>
the CL, namely: carbon, Pt particles, ionomer and voids.<br/><br>
In this work, a micro-model of the cathode CL has been developed<br/><br>
mathematically using finite volume (FV) technique to reconstruct<br/><br>
the local structure and further investigate the transport<br/><br>
phenomena of reactants and product species, ions and electrons<br/><br>
by incorporating the above stated phases at the cathode<br/><br>
side only, due to the fact that the OR reactions are the rate limiting<br/><br>
as compared to HO reaction. The 3D CL has been reconstructed<br/><br>
based on a regularly distributed sphere’s method with<br/><br>
dimensions 4:14:14:1 μm3. Platinum particles combined<br/><br>
with carbon spheres (C/Pt) are regularly placed in the domain,<br/><br>
an ionomer layer of a given thickness is extruded from the sphere<br/><br>
surfaces. The C/Pt, ionomer and void distribution, as well as<br/><br>
Address all correspondence to this author. (munir.khan@energy.lth.se)<br/><br>
the triple phase boundary (TPB) are analysed and discussed. A<br/><br>
microscopic model has been developed for water generation and<br/><br>
species transport including Knudsen diffusion through the voids<br/><br>
and the proton transport in the ionomer has been included here<br/><br>
to aim for the rigorousness of the work. In addition, the electrochemical<br/><br>
reactions have been simulated on the surface of Pt particles<br/><br>
fulfilling the TBP conditions.}},
author = {{Khan, Munir and Xiao, Yexiang and Sundén, Bengt and Yuan, Jinliang}},
language = {{eng}},
title = {{Analysis of multiphase tranport phenomena in PEMFCs by incorporating microscopic model for catalyst layer structure}},
year = {{2011}},
}