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Enhanced Imaging of Lithium Ion Battery Electrode Materials

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J. Electrochem. Soc.-2017-Biton-A6032-8.pdfPublished version1.88 MBAdobe PDFDownload
Title: Enhanced Imaging of Lithium Ion Battery Electrode Materials
Author(s): Biton, M
Yufit, V
Tariq, F
Kishimoto, M
Brandon, NP
Item Type: Journal Article
Abstract: In this study we present a novel method of lithium ion battery electrode sample preparation with a new type of epoxy impregnation, brominated (Br) epoxy, which is introduced here for the first time for this purpose and found suitable for focused ion beam scanning electron microscope (FIB-SEM) tomography. The Br epoxy improves image contrast, which enables higher FIB-SEM resolution (3D imaging), which is amongst the highest ever reported for composite LFP cathodes using FIB-SEM. In turn it means that the particles are well defined and the size distribution of each phase can be analyzed accurately from the complex 3D electrode microstructure using advanced quantification algorithms. The authors present for the first time a new methodology of contrast enhancement for 3D imaging, including novel advanced quantification, on a commercial Lithium Iron Phosphate (LFP) LiFePO4 cathode. The aim of this work is to improve the quality of the 3D imaging of challenging battery materials by developing methods to increase contrast between otherwise previously poorly differentiated phases. This is necessary to enable capture of the real geometry of electrode microstructures, which allows measurement of a wide range of microstructural properties such as pore/particle size distributions, surface area, tortuosity and porosity. These properties play vital roles in determining the performance of battery electrodes.
Publication Date: 2-Sep-2016
Date of Acceptance: 22-Aug-2016
URI: http://hdl.handle.net/10044/1/39824
DOI: http://dx.doi.org/10.1149/2.0061701jes
ISSN: 0013-4651
Publisher: Electrochemical Society
Start Page: A6032
End Page: A6038
Journal / Book Title: Journal of the Electrochemical Society
Volume: 164
Issue: 1
Copyright Statement: © The Author(s) 2016. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.
Keywords: Energy
0303 Macromolecular And Materials Chemistry
0306 Physical Chemistry (Incl. Structural)
0912 Materials Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Earth Science and Engineering



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