Projects per year
Abstract
Solid oxide fuel cells (SOFCs) directly convert chemical energy to electricity with high electrical efficiency. It involves gas transport through the porous electrode to the three-phase boundaries (TPB). The tortuosity of gas transport relates the bulk diffusion of gas in free space to the effective diffusion coefficient of gas migrating through a porous material. Therefore, determining the tortuosity is of great importance. This paper tests button SOFCs with NiO-YSZ as anode material followed by dual beam-focused ion beam scanning electron microscopy (FIB-SEM) to obtain 2D serial slice images. Based on processed 2D images and reconstructed 3D microstructure, the tortuosity is calculated using three approaches i.e., porosity-tortuosity correlations, voxel-based, and path-length-based approaches. The test results show that a decrease in Ni content in the anode greatly decreases the cell performance due to a decreased percolated electronic phase. The sample with low performance has high tortuosity. Different approaches vary regarding the tortuosity value and computational time. The path-length-based approach can achieve reasonable accuracy in a relatively short time but is only valid for using the longest path length.
Original language | English |
---|---|
Journal | Journal of The Electrochemical Society |
Volume | 170 |
Issue number | 9 |
DOIs | |
Publication status | Published - 19 Sept 2023 |
Keywords
- Reconstruction
- SOFC
- Anode
- CFD simulation
- Tortuosity
- DRT analysis
Fingerprint
Dive into the research topics of 'Analysing tortuosity for solid oxide fuel cell anode material: experiments and modeling'. Together they form a unique fingerprint.Projects
- 3 Finished
-
Light Element Analysis Facility (LEAF): Light Element Analysis Facility (LEAF)
Irvine, J. T. S. (PI), Baker, R. (CoI) & Miller, D. N. (CoI)
5/04/20 → 4/04/23
Project: Standard
-
Electon Microscopy: Electon Microscopy for the characterisation and manipulation of advanced function materials and their interfaces at the nanoscale
Irvine, J. T. S. (PI), Baker, R. (CoI) & Zhou, W. (CoI)
1/04/18 → 2/09/20
Project: Standard
-
CM-DTC EQUIPMENT ACCOUNT: Capital Equipment for Centres of Doctoral Training
Hooley, C. (PI)
1/09/14 → 30/06/15
Project: Standard