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This content will become publicly available on March 1, 2026

Title: Image registration for accurate electrode deformation analysis in operando microscopy of battery materials
Operandoimaging techniques have become increasingly valuable in both battery research and manufacturing. However, the reliability of these methods can be compromised by instabilities in the imaging setup andoperandocells, particularly when utilizing high-resolution imaging systems. The acquired imaging data often include features arising from both undesirable system vibrations and drift, as well as the scientifically relevant deformations occurring in the battery sample during cell operation. For meaningful analysis, it is crucial to distinguish and separately evaluate these two factors. To address these challenges, we employ a suite of advanced image-processing techniques. These include fast Fourier transform analysis in the frequency domain, power spectrum-based assessments for image quality, as well as rigid and non-rigid image-registration methods. These techniques allow us to identify and exclude blurred images, correct for displacements caused by motor vibrations and sample holder drift and, thus, prevent unwanted image artifacts from affecting subsequent analyses and interpretations. Additionally, we apply optical flow analysis to track the dynamic deformation of battery electrode materials during electrochemical cycling. This enables us to observe and quantify the evolving mechanical responses of the electrodes, offering deeper insights into battery degradation. Together, these methods ensure more accurate image analysis and enhance our understanding of the chemomechanical interplay in battery performance and longevity.  more » « less
Award ID(s):
2412156
PAR ID:
10616318
Author(s) / Creator(s):
; ; ;
Publisher / Repository:
Journal of Synchrotron Radiation
Date Published:
Journal Name:
Journal of Synchrotron Radiation
Volume:
32
Issue:
2
ISSN:
1600-5775
Page Range / eLocation ID:
417 to 423
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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