Quantifying bulk electrode strain and material displacement within lithium batteries via high-speed operando tomography and digital volume correlation
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Tracking the dynamic morphology of active materials during operation of lithium batteries is essential for identifying causes of performance loss. Digital volume correlation (DVC) is applied to high-speed operando synchrotron X-ray computed tomography of a commercial Li/MnO2 primary battery during discharge. Real-time electrode material displacement is captured in 3D allowing degradation mechanisms such as delamination of the electrode from the current collector and electrode crack formation to be identified. Continuum DVC of consecutive images during discharge is used to quantify local displacements and strains in 3D throughout discharge, facilitating tracking of the progression of swelling due to lithiation within the electrode material in a commercial, spiral-wound battery during normal operation. Displacement of the rigid current collector and cell materials contribute to severe electrode detachment and crack formation during discharge, which is monitored by a separate DVC approach. Use of time-lapse X-ray computed tomography coupled with DVC is thus demonstrated as an effective diagnostic technique to identify causes of performance loss within commercial lithium batteries; this novel approach is expected to guide the development of more effective commercial cell designs.
Date Issued
2015-12-18
Date Acceptance
2015-11-12
Citation
Advanced Science, 2015, 3 (3)
ISSN
2198-3844
Publisher
Wiley
Journal / Book Title
Advanced Science
Volume
3
Issue
3
Copyright Statement
© 2015 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
License URL
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemistry
Science & Technology - Other Topics
Materials Science
LI-ION BATTERIES
IN-SITU
IMAGE CORRELATION
LOCALIZED DEFORMATION
STRESS EVOLUTION
INTERCALATION
CELLS
DEGRADATION
DIFFRACTION
PERFORMANCE
Publication Status
Published
Article Number
1500332