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Methods-Spatially Resolved Diffraction Study of the Uniformity of a Li-Ion Pouch Cell

Sørensen, Daniel Risskov LU orcid ; Heere, Michael ; Smith, Anna ; Schwab, Christopher ; Sigel, Florian ; Jørgensen, Mads Ry Vogel LU orcid ; Baran, Volodymyr ; Schökel, Alexander ; Knapp, Michael and Ehrenberg, Helmut , et al. (2022) In Journal of the Electrochemical Society 169(3).
Abstract

A lab-made, multilayered Li-ion battery pouch cell is investigated using in-operando neutron powder diffraction (NPD) and spatially resolved powder X-ray diffraction (SR-PXRD) with the aim of investigating how to compare the information obtained from the two complementary techniques on a cell type with a complicated geometry for diffraction. The work focusses on the anode and cathode lithiation as obtained from the LiC6/LiC12 weight ratio and the NMC111 c/a-ratio, respectively. Neutron powder diffractograms of a sufficient quality for Rietveld refinement are measured using a rotation stage to minimize geometrical effects. Using SR-PXRD, the cell is shown to be non-uniform in its anode and cathode lithiation, with the edges of the cell... (More)

A lab-made, multilayered Li-ion battery pouch cell is investigated using in-operando neutron powder diffraction (NPD) and spatially resolved powder X-ray diffraction (SR-PXRD) with the aim of investigating how to compare the information obtained from the two complementary techniques on a cell type with a complicated geometry for diffraction. The work focusses on the anode and cathode lithiation as obtained from the LiC6/LiC12 weight ratio and the NMC111 c/a-ratio, respectively. Neutron powder diffractograms of a sufficient quality for Rietveld refinement are measured using a rotation stage to minimize geometrical effects. Using SR-PXRD, the cell is shown to be non-uniform in its anode and cathode lithiation, with the edges of the cell being less lithiated/delithiated than the center in the fully charged state. The non-uniformity is more pronounced for high charging current than low charging current. The averaged SR-PXRD data is found to match the bulk NPD data well. This is encouraging as it seems to allow comparisons between studies using either of these complementary techniques. This work will also serve as a benchmark for our future studies on pouch cells with novel non-commercial cathode and/or anode materials.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Electrochemical Society
volume
169
issue
3
article number
030518
publisher
Electrochemical Society
external identifiers
  • scopus:85126658832
ISSN
0013-4651
DOI
10.1149/1945-7111/ac59f9
language
English
LU publication?
yes
id
aa2ab1c0-ae76-4e36-a44b-fa2dd903d5c0
date added to LUP
2022-06-08 10:41:10
date last changed
2023-12-05 14:57:52
@article{aa2ab1c0-ae76-4e36-a44b-fa2dd903d5c0,
  abstract     = {{<p>A lab-made, multilayered Li-ion battery pouch cell is investigated using in-operando neutron powder diffraction (NPD) and spatially resolved powder X-ray diffraction (SR-PXRD) with the aim of investigating how to compare the information obtained from the two complementary techniques on a cell type with a complicated geometry for diffraction. The work focusses on the anode and cathode lithiation as obtained from the LiC6/LiC12 weight ratio and the NMC111 c/a-ratio, respectively. Neutron powder diffractograms of a sufficient quality for Rietveld refinement are measured using a rotation stage to minimize geometrical effects. Using SR-PXRD, the cell is shown to be non-uniform in its anode and cathode lithiation, with the edges of the cell being less lithiated/delithiated than the center in the fully charged state. The non-uniformity is more pronounced for high charging current than low charging current. The averaged SR-PXRD data is found to match the bulk NPD data well. This is encouraging as it seems to allow comparisons between studies using either of these complementary techniques. This work will also serve as a benchmark for our future studies on pouch cells with novel non-commercial cathode and/or anode materials. </p>}},
  author       = {{Sørensen, Daniel Risskov and Heere, Michael and Smith, Anna and Schwab, Christopher and Sigel, Florian and Jørgensen, Mads Ry Vogel and Baran, Volodymyr and Schökel, Alexander and Knapp, Michael and Ehrenberg, Helmut and Senyshyn, Anatoliy}},
  issn         = {{0013-4651}},
  language     = {{eng}},
  number       = {{3}},
  publisher    = {{Electrochemical Society}},
  series       = {{Journal of the Electrochemical Society}},
  title        = {{Methods-Spatially Resolved Diffraction Study of the Uniformity of a Li-Ion Pouch Cell}},
  url          = {{http://dx.doi.org/10.1149/1945-7111/ac59f9}},
  doi          = {{10.1149/1945-7111/ac59f9}},
  volume       = {{169}},
  year         = {{2022}},
}