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

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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Senyshyn A,Mühlbauer MJ,Dolotko O,Hofmann M,Ehrenberg H

doi

10.1038/srep18380

subject

Has Abstract

pub_date

2015-12-18 00:00:00

pages

18380

issn

2045-2322

pii

srep18380

journal_volume

5

pub_type

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