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4D nano-tomography of electrochemical energy devices using lab-based X-ray imaging

Journal Article · · Nano Energy
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1]
  1. UCL, London, London (United Kingdom)
  2. UCL, London, London (United Kingdom); National Renewable Energy Lab. (NREL), Lakewood, CO (United States)
Electrochemical energy devices offer a variety of alternate means for low-carbon, multi-scale energy conversion and storage. Reactions in these devices are supported by electrodes with characteristically complex microstructures. To meet the increasing capacity and lifetime demands across a range of applications, it is essential to understand microstructural evolutions at a cell and electrode level which are thought to be critical aspects influencing material and device lifetime and performance. X-ray computed tomography (CT) has become a highly employed method for non-destructive characterisation of such microstructures with high spatial resolution. However, sub-micron resolutions present significant challenges for sample preparation and handling particularly in 4D studies, (three spatial dimensions plus time). Here, microstructural information is collected from the same region of interest within two electrode materials: a solid oxide fuel cell and the positive electrode from a lithium-ion battery. Using a lab-based X-ray instrument, tomograms with sub-micron resolutions were obtained between thermal cycling. The intricate microstructural evolutions captured within these two materials provide model examples of 4D X-ray nano-CT capabilities in tracking challenging degradation mechanisms. Furthermore, this technique is valuable in the advancement of electrochemical research as well as broader applications for materials characterisation.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1432607
Report Number(s):
NREL/JA--5400-71275
Journal Information:
Nano Energy, Journal Name: Nano Energy Journal Issue: C Vol. 47; ISSN 2211-2855
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (6)

Correlative Nano‐Computed Tomography and Focused Ion‐Beam Sectioning: A Case Study on a Co‐Base Superalloy Oxide Scale journal November 2019
4D imaging of lithium-batteries using correlative neutron and X-ray tomography with a virtual unrolling technique journal February 2020
Evaluating microstructure evolution in an SOFC electrode using digital volume correlation journal January 2018
Thermally Driven SOFC Degradation in 4D: Part II. Macroscale journal January 2018
Thermally Driven SOFC Degradation in 4D: Part I. Microscale journal January 2018
Development and evaluation of a composite supercapacitor-based 12 V transient start–stop power system for vehicles: Modelling, design and fabrication scaling up journal June 2020

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