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

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 μm, and contains a microporous layer (MPL) coating which has sub-micron porous features. In the current study, real-world digital threedimension...

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Bibliographic Details
Main Authors: Hossein Ostadi, Kyle Jiang, Pratap Rama, Yu Liu, Rui Chen
Format: Default Article
Published: 2010
Subjects:
Other engineering not elsewhere classified
Gas diffusion layer
Microporous layer
FIB/SEM nano-tomography
X-ray nanotomography
Lattice Boltzmann numerical modeling
Engineering not elsewhere classified
Online Access:https://hdl.handle.net/2134/8307
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Summary: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 μm, and contains a microporous layer (MPL) coating which has sub-micron porous features. In the current study, real-world digital threedimensional 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, characteristics lengths and 3D pore size distribution are determined directly from the 3D digital representation. In addition to morphological parameters, the FIB/SEM nanotomography technique has been combined with lattice Boltzmann (LB) numerical modelling in order to calculate the tortuosity and permeability of the MPL.

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