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Title: Development of low temperature fuel cell holders for Operando x-ray micro and nano computed tomography to visualize water distribution

Journal Article · · JPhys Energy

Abstract Synchrotron x-ray imaging techniques, like x-ray computed tomography (CT) and radiography have proven instrumental in expanding the communities knowledge of complex transport and reaction kinetics in electrochemical devices such as fuel cells and electrolyzers. This work presents the development of novel x-ray CT imaging techniques for operando visualization of water within low temperature fuel cells at spatial resolutions spanning the micro and nano scales. The design of operando sample holders, for both micro x-ray CT and nano CT experiments is described in depth, and prototypes of these sample holders were evaluated across a set of requirements, the most important of which are x-ray transmissibility, electrical conductivity and mechanical stability. Water segmentation from micro x-ray CT data was enabled by an image subtraction method, where the image without water is subtracted from the one with water. Through iterative experimentations, the operando nano CT cell was developed to optimize mechanical compression, electric conductivity and gas flow. While three-dimensional fuel cell reconstructions were shown possible, there remain challenges to overcome at typical lower energies (8 keV) due to beam damage, whereas it is not as significant for higher energies (>17.5 keV).

Sponsoring Organization:
USDOE
Grant/Contract Number:
EE0007270
OSTI ID:
1670807
Journal Information:
JPhys Energy, Journal Name: JPhys Energy Vol. 2 Journal Issue: 4; ISSN 2515-7655
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (46)

3D Printed Flow Field and Fixture for Visualization of Water Distribution in Fuel Cells by X-ray Computed Tomography journal January 2016
Multi‐Scale Imaging of Polymer Electrolyte Fuel Cells using X‐ray Micro‐ and Nano‐Computed Tomography, Transmission Electron Microscopy and Helium‐Ion Microscopy journal January 2019
Direct observations of liquid water formation at nano- and micro-scale in platinum group metal-free electrodes by operando X-ray computed tomography journal September 2018
Understanding Liquid-Water Management in PEFCs Using X-Ray Computed Tomography and Modeling journal September 2015
Investigation of water evolution and transport in fuel cells with high resolution synchrotron x-ray radiography journal April 2007
Multi-scale 3D investigations of a commercial 18650 Li-ion battery with correlative electron- and X-ray microscopy journal July 2017
X-ray microtomography of materials journal April 1999
Fast in situ 3D nanoimaging: a new tool for dynamic characterization in materials science journal September 2017
Optimum energies for x-ray transmission tomography of small samples journal March 1983
Investigating Phase‐Change‐Induced Flow in Gas Diffusion Layers in Fuel Cells with X‐ray Computed Tomography journal December 2017
Electrocatalyst approaches and challenges for automotive fuel cells journal June 2012
Enhanced Water Management of Polymer Electrolyte Fuel Cells with Additive-Containing Microporous Layers journal September 2018
Probing water distribution in compressed fuel-cell gas-diffusion layers using X-ray computed tomography journal April 2015
Review of Advances in Thermal Spreading Resistance Problems journal October 2016
Coupled Thermal and Water Management in Polymer Electrolyte Fuel Cells journal January 2006
Three-Dimensional Microstructural Imaging of Sulfur Poisoning-Induced Degradation in a Ni-YSZ Anode of Solid Oxide Fuel Cells journal June 2014
Improving water management in fuel cells through microporous layer modifications: Fast operando tomographic imaging of liquid water journal September 2019
Operando Spectroscopic Microscopy of LiCoO2 Cathodes Outside Standard Operating Potentials journal September 2017
4D in situ visualization of electrode morphology changes during accelerated degradation in fuel cells by X-ray computed tomography journal May 2017
Imaging ionomer in fuel cell catalyst layers with synchrotron nano transmission x-ray microscopy journal July 2019
Direct three-dimensional reconstruction of a nanoporous catalyst layer for a polymer electrolyte fuel cell journal February 2011
Low-dose x-ray tomography through a deep convolutional neural network journal February 2018
Fundamental limits to imaging resolution for focused ion beams journal November 1996
Modeling and high-resolution-imaging studies of water-content profiles in a polymer-electrolyte-fuel-cell membrane-electrode assembly journal November 2008
New Insights into Perfluorinated Sulfonic-Acid Ionomers journal January 2017
X-ray nanotomography journal December 2007
Mechanisms and effects of mechanical compression and dimensional change in polymer electrolyte fuel cells – A review journal June 2015
Impact of synchrotron radiation on fuel cell operation in imaging experiments journal October 2010
Materials research and development focus areas for low cost automotive proton-exchange membrane fuel cells journal December 2019
Progress in In Situ X-Ray Tomographic Microscopy of Liquid Water in Gas Diffusion Layers of PEFC journal January 2011
Designing the 3D Architecture of PGM-Free Cathodes for H 2 /Air Proton Exchange Membrane Fuel Cells journal September 2019
X-Ray Tomography for Lithium Ion Battery Research: A Practical Guide journal July 2017
Interfacial analysis of a PEM electrolyzer using X-ray computed tomography journal January 2020
Radiation damage in polymer films from grazing-incidence X-ray scattering measurements journal February 2016
Progress and perspectives for atomic-resolution electron microscopy journal February 2008
Understanding the Role of Interfaces for Water Management in Platinum Group Metal-Free Electrodes in Polymer Electrolyte Fuel Cells journal April 2019
X-Ray Tomographic Microscopy (XTM) Using Synchrotron Radiation journal August 1992
Operando Sub-Second Tomographic Imaging of Water in PEFC Gas Diffusion Layers journal September 2015
Nano-structured platinum group metal-free catalysts and their integration in fuel cell electrode architectures journal December 2018
X-ray transparent proton-exchange membrane fuel cell design for in situ wide and small angle scattering tomography journal October 2019
Using operando techniques to understand and design high performance and stable alkaline membrane fuel cells journal July 2020
Design of a miniature flow cell for in situ x-ray imaging of redox flow batteries journal October 2016
Understanding water management in platinum group metal-free electrodes using neutron imaging journal October 2020
Operando X-ray tomography and sub-second radiography for characterizing transport in polymer electrolyte membrane electrolyzer journal June 2018
Hard X-ray-induced damage on carbon–binder matrix for in situ synchrotron transmission X-ray microscopy tomography of Li-ion batteries journal March 2017
Bridging X-ray computed tomography and computational modeling for electrochemical energy-conversion and –storage journal February 2019