Advanced

Analysis of Multiphase Transport Phenomena in PEMFCS by Incorporating Microscopic Model for Catalyst Layer Structures

Khan, Munir LU ; Xiao, Yexiang LU ; Sundén, Bengt LU and Yuan, Jinliang LU (2012) ASME International Mechanical Engineering Congress and Exposition (IMECE), 2011 In Proceedings Of The ASME International Mechanical Engineering Congress and Exposition, 2011, Vol 4, Pts A and B p.903-912
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 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... (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 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 4.1 x 4.1 x 4.1 mu m(3). 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 the triple phase boundary (TPB) are analysed and discussed. A microscopic model has been developed for water generation and species transport via 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 electro-chemical reactions have been simulated on the surface of Pt particles fitlfilling the TBP conditions. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
PEMFC, catalyst layer, micro model, catalyst reconstruction
in
Proceedings Of The ASME International Mechanical Engineering Congress and Exposition, 2011, Vol 4, Pts A and B
pages
903 - 912
publisher
Amer. Soc. Mechanical Engineers
conference name
ASME International Mechanical Engineering Congress and Exposition (IMECE), 2011
external identifiers
  • WOS:000324959300105
language
English
LU publication?
yes
id
42961b2c-325b-4368-aee0-4610a04fa238 (old id 4171679)
date added to LUP
2013-11-28 10:34:55
date last changed
2016-04-16 10:14:36
@inproceedings{42961b2c-325b-4368-aee0-4610a04fa238,
  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 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 4.1 x 4.1 x 4.1 mu m(3). 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 the triple phase boundary (TPB) are analysed and discussed. A microscopic model has been developed for water generation and species transport via 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 electro-chemical reactions have been simulated on the surface of Pt particles fitlfilling the TBP conditions.},
  author       = {Khan, Munir and Xiao, Yexiang and Sundén, Bengt and Yuan, Jinliang},
  booktitle    = {Proceedings Of The ASME International Mechanical Engineering Congress and Exposition, 2011, Vol 4, Pts A and B},
  keyword      = {PEMFC,catalyst layer,micro model,catalyst reconstruction},
  language     = {eng},
  pages        = {903--912},
  publisher    = {Amer. Soc. Mechanical Engineers},
  title        = {Analysis of Multiphase Transport Phenomena in PEMFCS by Incorporating Microscopic Model for Catalyst Layer Structures},
  year         = {2012},
}