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URN: urn:nbn:de:swb:90-527883

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

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

Abstract:
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.


Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Institut für Angewandte Materialien - Energiespeichersysteme (IAM-ESS)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen ID: 1000052788
HGF-Programm 37.01.03; LK 01
Erschienen in Scientific reports
Band 5
Seiten Art.Nr.: 18380
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