Multi-scale correlative tomography of a Li-Ion battery composite cathode

Abstract: 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 isintroduced. 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

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch
• Notes: Scientific Reports.2016. 30109. DOI 10.1038/srep30109, issn: 2045-2322 ; IN COPYRIGHT http://rightsstatements.org/page/InC/1.0 rs

Classification and Topics

• Classification: Physik
• Keyword: Batterie ; Bildgebendes Verfahren ; Poröser Stoff

Contributors, Places and Time

• Event: Veröffentlichung
• (where): Freiburg
• (who): Universität
• (when): 2016
• Creator: Moroni, Riko ; Börner, Markus ; Zielke, Lukas ; Schroeder, Melanie ; Nowak, Sascha ; Zengerle, Roland ; Thiele, Simon
• Contributor: MEET Battery Research Center ; Institut für Mikrosystemtechnik ; Helmholtz-Zentrum Berlin für Materialien und Energie ; Hahn-Schickard-Institut für Mikroanalysesysteme ; Freiburger Zentrum für interaktive Werkstoffe und bioinspirierte Technologien ; Albert-Ludwigs-Universität Freiburg

Further information

• DOI: 10.1038/srep30109
• URN: urn:nbn:de:bsz:25-freidok-116047
• Rights: Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 25.03.2025, 1:57 PM CET