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Chemical Structures of Specific Sodium Ion Battery Components Determined by Operando Pair Distribution Function and X-ray Diffraction Computed Tomography

Jonas Sottmann, Marco Di Michiel, Helmer Fjellvåg, Lorenzo Malavasi, Serena Margadonna Orcid Logo, Ponniah Vajeeston, Gavin B. M. Vaughan, David S. Wragg

Angewandte Chemie International Edition, Volume: 56, Issue: 38, Pages: 11385 - 11389

Swansea University Author: Serena Margadonna Orcid Logo

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DOI (Published version): 10.1002/anie.201704271

Abstract

To improve lithium and sodium ion battery technology we must understand how the properties of the components are controlled by their chemical structures. Operando structural studies give us some of the most useful information on how batteries work, but it remains difficult to separate out the contri...

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Published in: Angewandte Chemie International Edition
ISSN: 1433-7851
Published: 2017
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa34514
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Abstract: To improve lithium and sodium ion battery technology we must understand how the properties of the components are controlled by their chemical structures. Operando structural studies give us some of the most useful information on how batteries work, but it remains difficult to separate out the contributions of the various components of a battery stack (e.g. electrodes, current collectors, electrolyte and binders) and examine specific materials. We have used operando X-ray diffraction computed tomography (XRD-CT) to study specific components of an essentially unmodified, working cell and extract detailed, space resolved structural information on both crystalline and amorphous phases present during cycling. We illustrate this method with the first detailed structural examination of the cycling of sodium in a phosphorus anode, revealing surprisingly different mechanisms for sodiation and desodiation in this promising, high capacity anode system.
Keywords: Secondary batteries, electrode materials, in operando measuraments
College: Faculty of Science and Engineering
Issue: 38
Start Page: 11385
End Page: 11389

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