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Multi-Scale Correlative Tomography of a Li-Ion Battery Composite Cathode

Focused ion beam/scanning electron microscopy tomography (FIB/SEMt) and synchrotron X-ray tomography (Xt) are used to investigate the same lithium manganese oxide composite cathode at the same specific spot. This correlative approach allows the investigation of three central issues in the tomographi...

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Autores principales: Moroni, Riko, Börner, Markus, Zielke, Lukas, Schroeder, Melanie, Nowak, Sascha, Winter, Martin, Manke, Ingo, Zengerle, Roland, Thiele, Simon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4960488/
https://www.ncbi.nlm.nih.gov/pubmed/27456201
http://dx.doi.org/10.1038/srep30109
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author Moroni, Riko
Börner, Markus
Zielke, Lukas
Schroeder, Melanie
Nowak, Sascha
Winter, Martin
Manke, Ingo
Zengerle, Roland
Thiele, Simon
author_facet Moroni, Riko
Börner, Markus
Zielke, Lukas
Schroeder, Melanie
Nowak, Sascha
Winter, Martin
Manke, Ingo
Zengerle, Roland
Thiele, Simon
author_sort Moroni, Riko
collection PubMed
description Focused ion beam/scanning electron microscopy tomography (FIB/SEMt) and synchrotron X-ray tomography (Xt) are used to investigate the same lithium manganese oxide composite cathode at the same specific spot. This correlative approach allows the investigation of three central issues in the tomographic analysis of composite battery electrodes: (i) Validation of state-of-the-art binary active material (AM) segmentation: Although threshold segmentation by standard algorithms leads to very good segmentation results, limited Xt resolution results in an AM underestimation of 6 vol% and severe overestimation of AM connectivity. (ii) Carbon binder domain (CBD) segmentation in Xt data: While threshold segmentation cannot be applied for this purpose, a suitable classification method is introduced. Based on correlative tomography, it allows for reliable ternary segmentation of Xt data into the pore space, CBD, and AM. (iii) Pore space analysis in the micrometer regime: This segmentation technique is applied to an Xt reconstruction with several hundred microns edge length, thus validating the segmentation of pores within the micrometer regime for the first time. The analyzed cathode volume exhibits a bimodal pore size distribution in the ranges between 0–1 μm and 1–12 μm. These ranges can be attributed to different pore formation mechanisms.
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spelling pubmed-49604882016-08-04 Multi-Scale Correlative Tomography of a Li-Ion Battery Composite Cathode Moroni, Riko Börner, Markus Zielke, Lukas Schroeder, Melanie Nowak, Sascha Winter, Martin Manke, Ingo Zengerle, Roland Thiele, Simon Sci Rep Article Focused ion beam/scanning electron microscopy tomography (FIB/SEMt) and synchrotron X-ray tomography (Xt) are used to investigate the same lithium manganese oxide composite cathode at the same specific spot. This correlative approach allows the investigation of three central issues in the tomographic analysis of composite battery electrodes: (i) Validation of state-of-the-art binary active material (AM) segmentation: Although threshold segmentation by standard algorithms leads to very good segmentation results, limited Xt resolution results in an AM underestimation of 6 vol% and severe overestimation of AM connectivity. (ii) Carbon binder domain (CBD) segmentation in Xt data: While threshold segmentation cannot be applied for this purpose, a suitable classification method is introduced. Based on correlative tomography, it allows for reliable ternary segmentation of Xt data into the pore space, CBD, and AM. (iii) Pore space analysis in the micrometer regime: This segmentation technique is applied to an Xt reconstruction with several hundred microns edge length, thus validating the segmentation of pores within the micrometer regime for the first time. The analyzed cathode volume exhibits a bimodal pore size distribution in the ranges between 0–1 μm and 1–12 μm. These ranges can be attributed to different pore formation mechanisms. Nature Publishing Group 2016-07-26 /pmc/articles/PMC4960488/ /pubmed/27456201 http://dx.doi.org/10.1038/srep30109 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Moroni, Riko
Börner, Markus
Zielke, Lukas
Schroeder, Melanie
Nowak, Sascha
Winter, Martin
Manke, Ingo
Zengerle, Roland
Thiele, Simon
Multi-Scale Correlative Tomography of a Li-Ion Battery Composite Cathode
title Multi-Scale Correlative Tomography of a Li-Ion Battery Composite Cathode
title_full Multi-Scale Correlative Tomography of a Li-Ion Battery Composite Cathode
title_fullStr Multi-Scale Correlative Tomography of a Li-Ion Battery Composite Cathode
title_full_unstemmed Multi-Scale Correlative Tomography of a Li-Ion Battery Composite Cathode
title_short Multi-Scale Correlative Tomography of a Li-Ion Battery Composite Cathode
title_sort multi-scale correlative tomography of a li-ion battery composite cathode
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4960488/
https://www.ncbi.nlm.nih.gov/pubmed/27456201
http://dx.doi.org/10.1038/srep30109
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