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

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

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

Materials Science 2015-03-27 v1

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

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.

Keywords

Li-ion batteries lithium distribution neutron powder diffraction graphite anode homogeneity 18650-type cells X-ray computed tomography

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@article{arxiv.1503.07655,
  title  = {Homogeneity of lithium distribution in cylinder-type Li-ion batteries},
  author = {A. Senyshyn and M. J. Mühlbauer and O. Dolotko and M. Hofmann and H. Ehrenberg},
  journal= {arXiv preprint arXiv:1503.07655},
  year   = {2015}
}

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

Abstract

Keywords

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