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Homogeneity of lithium distribution in cylinder-type Li-ion batteries

Senyshyn, A.; Mühlbauer, M.J.; Dolotko, O.; Hofmann, M.; Ehrenberg, H.

Spatially-resolved neutron powder diffraction with a gauge volume of 2 × 2 × 20 mm$^{3}$ has been applied as an in situ method to probe the lithium concentration in the graphite anode of different Li-ion cells of 18650-type in charged state. Structural studies performed in combination with electrochemical measurements and X-ray computed tomography under real cell operating conditions unambiguously revealed non-homogeneity of the lithium distribution in the graphite anode. Deviations from a homogeneous behaviour have been found in both radial and axial directions of 18650-type cells and were discussed in the frame of cell geometry and electrical connection of electrodes, which might play a crucial role in the homogeneity of the lithium distribution in the active materials within each electrode.

Volltext §
DOI: 10.5445/IR/1000052788
DOI: 10.1038/srep18380
Zitationen: 36
Zitationen: 38
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Institut für Angewandte Materialien - Energiespeichersysteme (IAM-ESS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2015
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000052788
HGF-Programm 37.01.03 (POF III, LK 01) Batteries in Application
Erschienen in Scientific reports
Verlag Nature Research
Band 5
Seiten Art.Nr.: 18380
Nachgewiesen in Dimensions
Web of Science
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