Advanced

Comparing through-plane diffusibility correlations in PEFC gas diffusion layers using the lattice Boltzmann method

Espinoza-Andaluz, Mayken LU ; Andersson, Martin LU and Sundén, Bengt LU (2017) In International Journal of Hydrogen Energy 42(16). p.11689-11698
Abstract

One of the key elements in a polymer electrolyte fuel cell (PEFC) is the gas diffusion layer (GDL). The GDL offers mechanical support to the cell and provides the medium for diffusing the reactant gases from the flow plates to the electrolyte enabling the electrochemical reactions, and therefore the energy conversion. At the same time, it has the task of transporting the electrons from the active sites, near to the electrolyte, towards the flow plates. Describing the fluid flow and mass transport phenomena through the GDLs is not an easy task not only because of their complex geometries, but also because of these phenomena occur at microscale levels. Most of the PEFC models at cell scale make assumptions about certain microscale... (More)

One of the key elements in a polymer electrolyte fuel cell (PEFC) is the gas diffusion layer (GDL). The GDL offers mechanical support to the cell and provides the medium for diffusing the reactant gases from the flow plates to the electrolyte enabling the electrochemical reactions, and therefore the energy conversion. At the same time, it has the task of transporting the electrons from the active sites, near to the electrolyte, towards the flow plates. Describing the fluid flow and mass transport phenomena through the GDLs is not an easy task not only because of their complex geometries, but also because of these phenomena occur at microscale levels. Most of the PEFC models at cell scale make assumptions about certain microscale transport parameters, assumptions that can make a model less close to the reality. The purpose of this study is to analyze five different proposed correlations to estimate the through-plane (TP) diffusibility of digitally created GDLs and using lattice Boltzmann (LB) models. The correlations are ranked depending on their precision, accuracy and symmetry. The results show that the best estimation is given when the porosity and gas-phase tortuosity are taken into account in the correlation.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Diffusibility, Gas diffusion layer, Lattice Boltzmann method, Polymer electrolyte fuel cell, Transport parameters
in
International Journal of Hydrogen Energy
volume
42
issue
16
pages
10 pages
publisher
Elsevier
external identifiers
  • scopus:85014733910
  • wos:000403381400094
ISSN
0360-3199
DOI
10.1016/j.ijhydene.2017.02.096
language
English
LU publication?
no
id
97b52d38-3f6f-4bd0-b7c2-086462338852
date added to LUP
2017-04-05 14:19:42
date last changed
2018-06-10 05:17:35
@article{97b52d38-3f6f-4bd0-b7c2-086462338852,
  abstract     = {<p>One of the key elements in a polymer electrolyte fuel cell (PEFC) is the gas diffusion layer (GDL). The GDL offers mechanical support to the cell and provides the medium for diffusing the reactant gases from the flow plates to the electrolyte enabling the electrochemical reactions, and therefore the energy conversion. At the same time, it has the task of transporting the electrons from the active sites, near to the electrolyte, towards the flow plates. Describing the fluid flow and mass transport phenomena through the GDLs is not an easy task not only because of their complex geometries, but also because of these phenomena occur at microscale levels. Most of the PEFC models at cell scale make assumptions about certain microscale transport parameters, assumptions that can make a model less close to the reality. The purpose of this study is to analyze five different proposed correlations to estimate the through-plane (TP) diffusibility of digitally created GDLs and using lattice Boltzmann (LB) models. The correlations are ranked depending on their precision, accuracy and symmetry. The results show that the best estimation is given when the porosity and gas-phase tortuosity are taken into account in the correlation.</p>},
  author       = {Espinoza-Andaluz, Mayken and Andersson, Martin and Sundén, Bengt},
  issn         = {0360-3199},
  keyword      = {Diffusibility,Gas diffusion layer,Lattice Boltzmann method,Polymer electrolyte fuel cell,Transport parameters},
  language     = {eng},
  number       = {16},
  pages        = {11689--11698},
  publisher    = {Elsevier},
  series       = {International Journal of Hydrogen Energy},
  title        = {Comparing through-plane diffusibility correlations in PEFC gas diffusion layers using the lattice Boltzmann method},
  url          = {http://dx.doi.org/10.1016/j.ijhydene.2017.02.096},
  volume       = {42},
  year         = {2017},
}