3D reconstruction of a gas diffusion layer and a microporous layer

Research output: Contribution to journalArticle

Authors

  • H Ostadi
  • P Rama
  • Y Liu
  • R Chen
  • XX Zhang

Colleges, School and Institutes

Abstract

The focus of the current study is on a state-of-the-art twin-layer gas diffusion layer (GDL) which consists of carbon tissues with a fibre diameter of 5-20 mu m, and contains a microporous layer (MPL) coating which has sub-micron porous features. In the current study, real-world digital three-dimensional images of the GDL-MPL assembly are created through X-ray nano-tomography with a 680 nm pixel resolution for the GDL and focused ion beam/scanning electron microscopy (FIB/SEM) nano-tomography with a 14 nm pixel resolution for the MPL The critical nano-structural features including porosity, characteristic lengths and 3D pore size distribution are determined directly from the 3D digital representation. In addition to morphological parameters, the FIB/SEM nano-tomography technique has been combined with lattice Boltzmann (LB) numerical modelling in order to calculate the tortuosity and permeability of the MPL (C) 2010 Elsevier B.V. All rights reserved.

Details

Original languageEnglish
Pages (from-to)69-74
Number of pages6
JournalJournal of Membrane Science
Volume351
Issue number1-2
Publication statusPublished - 1 Apr 2010

Keywords

  • Lattice Boltzmann numerical modeling, X-ray nano-tomography, Microporous layer, Gas diffusion layer, FIB/SEM nano-tomography