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

2015/03/26 by Anatoliy Senyshyn, A. Senyshyn, M. J. Mühlbauer +11
Engineering · Physics and Astronomy · #Advanced Battery Materials and Technologies #Advanced Battery Technologies Research #Advancements in Battery Materials #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #cond-mat.mtrl-sci

paper · pdf · doi:10.48550/arxiv.1503.07655

arxiv created 2015/03/26 · openalex publication_date 2015/03/26 · arxiv updated 2015/03/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Spatially-resolved neutron powder diffraction with gauge volume 2x2x20 mm3 has been applied to probe the lithium concentration in the graphite anode of different Li-ion cells of 18650-type in situ 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 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.

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