Browsing Engineering (Faculty of) by Author "Gostick, Jeffrey Thomas"
Now showing items 1-15 of 15
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Direct measurement of the capillary pressure characteristics of water-air-gas diffusion layer systems for PEM fuel cells
Gostick, Jeffrey Thomas; Ioannidis, Marios A.; Fowler, Michael W.; Pritzker, Mark D. (Elsevier, 2008-10-01)A method and apparatus for measuring the relationship between air-water capillary pressure and water saturation in PEMFC gas diffusion layers is described. Capillary pressure data for water injection and withdrawal from ... -
Evaluation of Electrospun Fibrous Mats Targeted for Use as Flow Battery Electrodes
Liu, Selina; Kok, Matthew D. R.; Kim, Yongwook; Barton, John L.; Brushett, Fikile R.; Gostick, Jeffrey Thomas (The Electrochemical Society, 2017-07-14)Electrospinning was used to create custom-made fibrous electrode materials for redox flow batteries with targeted structural properties. The aim was to increase the available surface area for electrochemical reaction without ... -
Impact of Liquid Water on Reactant Mass Transfer in PEM Fuel Cell Electrodes
Gostick, Jeffrey Thomas; Ioannidis, Marios A.; Pritzker, Mark D.; Fowler, Michael W. (Electrochemical Society, 2010)The breakthrough conditions (capillary pressure and liquid water saturation) in a fibrous gas diffusion medium (GDM) used in polymer electrolyte membrane (PEM) fuel cell electrodes have been studied experimentally by two ... -
In situ compression and X-ray computed tomography of flow battery electrodes
Jervis, Rhodri; Kok, Matthew D. R.; Neville, Tobias P.; Meyer, Quentin; Brown, Leon D.; Iacoviello, Francesco; Gostick, Jeffrey Thomas; Brett, Dan J. L.; Shearing, Paul R. (Elsevier, 2018-09-01)Redox flow batteries offer a potential solution to an increase in renewable energy generation on the grid by offering long-term, large-scale storage and regulation of power. However, they are currently underutilised due ... -
In-plane and through-plane gas permeability of carbon fiber electrode backing layers
Gostick, Jeffrey Thomas; Fowler, Michael W.; Pritzker, Mark D.; Ioannidis, Marios A.; Behra, Leya M. (Elsevier, 2006-11-08)The absolute gas permeability of several common gas diffusion layer (GDL) materials for polymer electrolyte membrane fuel cells was measured. Measurements were made in three perpendicular directions to investigate anisotropic ... -
Mass transfer in fibrous media with varying anisotropy for flow battery electrodes: Direct numerical simulations with 3D X-ray computed tomography
Kok, Matthew D. R.; Jervis, Rhodri; Tranter, Thomas G.; Sadeghi, Mohammad Amin; Brett, Dan J. L.; Shearing, Paul R.; Gostick, Jeff T. (Elsevier, 2019-03-16)A numerical method for calculating the mass transfer coefficient in fibrous media is presented. First, pressure driven flow was modelled using the Lattice Boltzmann Method. The advection-diffusion equation was solved for ... -
Measuring effective diffusivity in porous media with a gasket-free, radial arrangement
Kim, Yongwook; Gostick, Jeffrey Thomas (Elsevier, 2019-02-01)A simple technique for measuring the effective diffusivity, and ultimately tortuosity, in porous media is presented. The method uses a custom-built apparatus, based on a radial geometry, which eliminates the need for any ... -
A method for measuring relative in-plane diffusivity of thin and partially saturated porous media: An application to fuel cell gas diffusion layers
Tranter, Thomas G.; Stogornyuk, Pavel; Gostick, Jeffrey Thomas; Burns, Alan. D.; Gale, William F. (Elsevier, 2017-07-01)A new experimental technique, extended from similar work on dry materials, is presented for measuring the in-plane components of the relative diffusivity tensor for partially saturated porous media. The method utilizes a ... -
Multiphase Mass Transfer and Capillary Properties of Gas Diffusion Layers for Polymer Electrolyte Membrane Fuel Cells
Gostick, Jeffrey Thomas (University of Waterloo, 2009-01-23)A detailed understanding of mass transport and water behavior in gas diffusion layers (GDLs) for polymer electrolyte membrane fuel cells (PEMFCs) is vital to improving performance. Liquid water fills the porous GDL and ... -
On the role of the microporous layer in PEMFC operation
Gostick, Jeffrey Thomas; Ioannidis, Marios A.; Fowler, Michael W.; Pritzker, Mark D. (Elsevier, 2009-03-01)The condition of liquid water breakthrough at the cathode of polymer electrolyte fuel cells (PEMFC) is studied experimentally and data on corresponding water saturation and capillary pressure are provided for gas diffusion ... -
Pore network modeling of fibrous gas diffusion layers for polymer electrolyte membrane fuel cells
Gostick, Jeffrey Thomas; Ioannidis, Marios A.; Fowler, Michael W.; Pritzker, Mark D. (Elsevier, 2007-11-08)A pore network model of the gas diffusion layer (GDL) in a polymer electrolyte membrane fuel cell is developed and validated. The model idealizes the GDL as a regular cubic network of pore bodies and pore throats following ... -
Pore network modeling of phase change in PEM fuel cell fibrous cathode
Aghighi, Mahmoudreza; Gostick, Jeffrey Thomas (Springer, 2017-12-01)A pore network model has been applied to the cathode side of a fuel cell membrane electrode assembly to investigate the mechanisms leading to liquid water formation in the cell. This model includes mass diffusion, liquid ... -
Pore network modeling of reaction-diffusion in hierarchical porous particles: the effects of microstructure
Sadeghi, Mohammad Amin; Aghighi, Mahmoudreza; Barralet, jake; Gostick, Jeffrey Thomas (Elsevier, 2017-07-24)A general framework based on pore network modeling is presented for simulation of reactive transport in a porous catalyst with a hierarchy of porosity. The proposed framework is demonstrated in the context of steady state ... -
Versatile and efficient pore network extraction method using marker-based watershed segmentation
Gostick, Jeffrey Thomas (American Physical Society, 2017-08-16)Obtaining structural information from tomographic images of porous materials is a critical component of porous media research. Extracting pore networks is particularly valuable since it enables pore network modeling ... -
Wettability and capillary behavior of fibrous gas diffusion media for polymer electrolyte membrane fuel cells
Gostick, Jeffrey Thomas; Ioannidis, Marios A.; Fowler, Michael W.; Pritzker, Mark D. (Elsevier, 2009-10-20)The relationship of capillary pressure to liquid saturation for the water-air fluid pair in two different types of gas diffusion media (GDM) used in polymer electrolyte membrane fuel cell (PEMFC) electrodes is elucidated. ...