期刊
JOURNAL OF MEMBRANE SCIENCE
卷 351, 期 1-2, 页码 69-74出版社
ELSEVIER
DOI: 10.1016/j.memsci.2010.01.031
关键词
Gas diffusion layer; Microporous layer; FIB/SEM nano-tomography; X-ray nano-tomography; Lattice Boltzmann numerical modeling
资金
- UK Technology Strategy Board (TSB) [TP/6/S/K3032H]
- AVL List GmbH
- Intelligent Energy Ltd.
- Johnson Matthey Fuel Cells Ltd.
- Saati Group Inc
- Technical Fibre Products Ltd.
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.
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