Journal Article

PUBDB-2021-04000

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Cycling Rate‐Induced Spatially‐Resolved Heterogeneities in Commercial Cylindrical Li‐Ion Batteries

Vamvakeros, A. (Corresponding author) ; Matras, D. ; Ashton, T. E. ; Coelho, A. A. ; Dong, H. ; Bauer, D. ; Odarchenko, Y.Extern* ; Price, S.Extern* ; Butler, K. T. ; Gutowski, O.DESY* ; Dippel, A.-C.DESY* ; von Zimmermann, M.DESY* ; Darr, J. A. ; Jacques, S. (Corresponding author)Extern* ; Beale, A. M.Extern*

2021
WILEY-VCH Verlag GmbH & Co. KGaA Weinheim

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Please use a persistent id in citations: doi:10.1002/smtd.202100512  doi:10.3204/PUBDB-2021-04000

Abstract: Synchrotron high-energy X-ray diffraction computed tomography has been employed to investigate, for the first time, commercial cylindrical Li-ion batteries electrochemically cycled over the two cycling rates of C/2 and C/20. This technique yields maps of the crystalline components and chemical species as a cross-section of the cell with high spatiotemporal resolution (550 × 550 images with 20 × 20 × 3 µm$^3$ voxel size in ca. 1 h). The recently developed Direct Least-Squares Reconstruction algorithm is used to overcome the well-known parallax problem and led to accurate lattice parameter maps for the device cathode. Chemical heterogeneities are revealed at both electrodes and are attributed to uneven Li and current distributions in the cells. It is shown that this technique has the potential to become an invaluable diagnostic tool for real-world commercial batteries and for their characterization under operating conditions, leading to unique insights into “real” battery degradation mechanisms as they occur.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-D (FS-PETRA-D)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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