Heterogeneity of Lithium Distribution in the Graphite Anode of 21700-Type Cylindrical Li-Ion Cells during Degradation

被引：8

作者：

Petz, Dominik ^{[1
,2
]}

Baran, Volodymyr ^{[3
]}

Park, Juyeon ^{[4
,5
]}

Schoekel, Alexander ^{[3
]}

Kriele, Armin ^{[6
]}

Rebelo Kornmeier, Joana ^{[2
]}

Paulmann, Carsten ^{[3
,7
]}

Koch, Max ^{[8
]}

Nilges, Tom ^{[8
]}

Mueller-Buschbaum, Peter ^{[1
,2
]}

Senyshyn, Anatoliy ^{[2
]}

机构：

[1] Tech Univ Munich, Chair Funct Mat, TUM Sch Nat Sci, Dept Phys, James Franck Str 1, D-85748 Garching, Germany

[2] Tech Univ Munich, Heinz Maier Leibnitz Zent MLZ, Lichtenbergstr 1, D-85748 Garching, Germany

[3] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany

[4] Natl Phys Lab, Hampton Rd, Teddington TW11 0LW, England

[5] Schlumberger Cambridge Res Ltd, Madingley Rd, Cambridge CB33 0EL, England

[6] Helmholtz Zentrum Hereon, German Engn Sci Ctr GEMS, Heinz Maier Leibnitz Zentrum MLZ, Lichtenbergstr 1, D-85748 Garching, Germany

[7] Univ Hamburg, Dept Earth Syst Sci, Grindelallee 48, D-20146 Hamburg, Germany

[8] Tech Univ Munich, Dept Chem, Synth & Charakterisierung Innovativer Mat, Lichtenbergstr 4, D-85748 Garching, Germany

来源：

BATTERIES-BASEL | 2024年 / 10卷 / 03期

关键词：

lithium-ion batteries; cell aging; lithium distribution; diffraction; Joule heating; resistance increase; INHOMOGENEOUS DEGRADATION; CONCENTRATION GRADIENTS; HIGH-POWER; BATTERIES; DIFFRACTION; POSTMORTEM; ELECTROLYTE; DENSITY; IMPACT; LAYER;

D O I：

10.3390/batteries10030068

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Structural and spatial aspects of cell degradation are studied using a combination of diffraction-and imaging-based tools applying laboratory X-rays, neutron scattering and synchrotron radiation with electrochemical and thermal characterization. Experimental characterization is carried out on cylindrical cells of 21700-type, where four regimes of cell degradation are identified, which are supplemented by an increased cell resistance and surface temperature during cell operation. The amount of intercalated lithium in the fully charged anodes in the fresh and aged states is determined by ex situ X-ray diffraction radiography and in situ X-ray diffraction computed tomography. The qualitatively similar character of the results revealed a loss of active lithium along with the development of a complex heterogeneous distribution over the electrode stripe.

引用

页数：18

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