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

被引:76
作者
Finegan, Donal P. [1 ]
Tudisco, Erika [2 ]
Scheel, Mario [3 ,4 ]
Robinson, James B. [1 ]
Taiwo, Oluwadamilola O. [1 ]
Eastwood, David S. [5 ,6 ]
Lee, Peter D. [5 ,6 ]
Di Michiel, Marco [3 ]
Bay, Brian [7 ]
Hall, Stephen A. [2 ]
Hinds, Gareth [8 ]
Brett, Dan J. L. [1 ]
Shearing, Paul R. [1 ]
机构
[1] UCL, Dept Chem Engn, Electrochem Innovat Lab, Torrington Pl, London WC1E 7JE, England
[2] Lund Univ, Div Solid Mech, S-22100 Lund, Sweden
[3] European Synchrotron, ESRF, 71 Rue Martyrs, F-38000 Grenoble, France
[4] Synchrotron Soleil, F-91192 Gif Sur Yvette, France
[5] Univ Manchester, Sch Mat, Manchester Xray Imaging Facil, Oxford Rd, Manchester M13 9PL, Lancs, England
[6] Harwell, Res Complex, Didcot OX11 0FA, Oxon, England
[7] Oregon State Univ, Sch Mech Ind & Mfg Engn, Corvallis, OR 97331 USA
[8] Natl Phys Lab, Hampton Rd, Teddington TW11 0LW, Middx, England
基金
英国工程与自然科学研究理事会; 英国科学技术设施理事会;
关键词
IN-SITU; LOCALIZED DEFORMATION; STRESS EVOLUTION; ION BATTERIES; INTERCALATION; DEGRADATION; DIFFRACTION; PERFORMANCE; FRACTURE; TIME;
D O I
10.1002/advs.201500332
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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.
引用
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页数:11
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