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Quantifying Bulk Electrode Strain and Material Displacement within Lithium Batteries via High-Speed Operando Tomography and Digital Volume Correlation.

Authors
  • Finegan, Donal P1
  • Tudisco, Erika2
  • Scheel, Mario3
  • Robinson, James B1
  • Taiwo, Oluwadamilola O1
  • Eastwood, David S4
  • Lee, Peter D4
  • Di Michiel, Marco5
  • Bay, Brian6
  • Hall, Stephen A2
  • Hinds, Gareth7
  • Brett, Dan J L1
  • Shearing, Paul R1
  • 1 Electrochemical Innovation Lab Department of Chemical Engineering University College London Torrington Place London WC1E 7JE UK.
  • 2 Division of Solid Mechanics Lund University 221 00 Lund Sweden. , (Sweden)
  • 3 ESRFThe European Synchrotron71 Rue des Martyrs38000GrenobleFrance; Synchrotron Soleil, L'Orme des MerisiersSaint-Aubin91192Gif-sur-YvetteFrance. , (France)
  • 4 Manchester X-ray Imaging FacilitySchool of MaterialsUniversity of ManchesterOxford RoadManchesterM13 9PLUK; Research Complex at HarwellHarwell Oxford, DidcotOxfordshireOX11 0FAUK.
  • 5 ESRF The European Synchrotron 71 Rue des Martyrs 38000 Grenoble France. , (France)
  • 6 School of Mechanical Industrial and Manufacturing Engineering Oregon State University Corvallis OR 97331-6001 USA.
  • 7 National Physical Laboratory Hampton Road Teddington Middlesex TW11 0LW UK.
Type
Published Article
Journal
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
Publication Date
Mar 01, 2016
Volume
3
Issue
3
Pages
1500332–1500332
Identifiers
PMID: 27610334
Source
Medline
Keywords
License
Unknown

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.

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