Journal Article

IMPULSE-2024-00139

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Heterogeneity of Lithium Distribution in the Graphite Anode of 21700-Type Cylindrical Li-Ion Cells during Degradation

Petz, D.MLZ* ; Baran, V. ; Park, J. ; Schökel, A. ; Kriele, A.MLZ* ; Rebelo Kornmeier, J.MLZ* ; Paulmann, C. ; Koch, M. ; Nilges, T. ; Müller-Buschbaum, P.MLZ* ; Senyshyn, A. (Corresponding author)MLZ*

2024
MDPI Basel

Please use a persistent id in citations: doi:10.3390/batteries10030068

Abstract: Structural and spatial aspects of cell degradation are studied using a combination of diffraction-and imaging-based tools applying laboratory X-rays, neutron scattering and synchrotron radiation with electrochemical and thermal characterization. Experimental characterization is carried out on cylindrical cells of 21700-type, where four regimes of cell degradation are identified, which are supplemented by an increased cell resistance and surface temperature during cell operation. The amount of intercalated lithium in the fully charged anodes in the fresh and aged states is determined by ex situ X-ray diffraction radiography and in situ X-ray diffraction computed tomography. The qualitatively similar character of the results revealed a loss of active lithium along with the development of a complex heterogeneous distribution over the electrode stripe.

Keyword(s): Energy (1st) ; Materials Science (2nd)

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Contributing Institute(s):

1. SPODI (SPODI)
2. DEVA (DEVA)
3. Technische Universität München (TUM)
4. E13 (E13)
5. MATSCI (MATSCI)

Experiment(s):

1. SPODI: High resolution powder diffractometer (SR8a)

Appears in the scientific report 2024

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