Visualizing nanoscale 3D compositional fluctuation of lithium in advanced lithium-ion battery cathodes

A. Devaraj, M. Gu, R. Colby, P. Yan, C. M. Wang, J. M. Zheng, J. Xiao, A. Genc, J. G. Zhang, I. Belharouak, D. Wang, K. Amine, S. Thevuthasan

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

The distribution of cations in Li-ion battery cathodes as a function of cycling is a pivotal characteristic of battery performance. The transition metal cation distribution has been shown to affect cathode performance; however, Li is notoriously challenging to characterize with typical imaging techniques. Here laser-assisted atom probe tomography (APT) is used to map the three-dimensional distribution of Li at a sub-nanometre spatial resolution and correlate it with the distribution of the transition metal cations (M) and the oxygen. As-fabricated layered Li<inf>1.2</inf> Ni<inf>0.2</inf> Mn<inf>0.6</inf> O<inf>2</inf> is shown to have Li-rich Li<inf>2</inf>MO<inf>3</inf> phase regions and Li-depleted Li(Ni<inf>0.5</inf> Mn<inf>0.5</inf>)O<inf>2</inf> regions. Cycled material has an overall loss of Li in addition to Ni-, Mn- and Li-rich regions. Spinel LiNi<inf>0.5</inf> Mn<inf>1.5</inf> O<inf>4</inf> is shown to have a uniform distribution of all cations. APT results were compared to energy dispersive spectroscopy mapping with a scanning transmission electron microscope to confirm the transition metal cation distribution.

Original languageEnglish
Article number8014
JournalNature Communications
Volume6
DOIs
Publication statusPublished - 14 Aug 2015

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Lithium
electric batteries
Cations
Electrodes
Cathodes
lithium
cathodes
Ions
cations
Transition metals
Metals
ions
transition metals
Tomography
tomography
Atoms
probes
Energy dispersive spectroscopy
Spectrum Analysis
Lasers

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Chemistry(all)
  • Physics and Astronomy(all)

Cite this

Devaraj, A., Gu, M., Colby, R., Yan, P., Wang, C. M., Zheng, J. M., ... Thevuthasan, S. (2015). Visualizing nanoscale 3D compositional fluctuation of lithium in advanced lithium-ion battery cathodes. Nature Communications, 6, [8014]. https://doi.org/10.1038/ncomms9014

Visualizing nanoscale 3D compositional fluctuation of lithium in advanced lithium-ion battery cathodes. / Devaraj, A.; Gu, M.; Colby, R.; Yan, P.; Wang, C. M.; Zheng, J. M.; Xiao, J.; Genc, A.; Zhang, J. G.; Belharouak, I.; Wang, D.; Amine, K.; Thevuthasan, S.

In: Nature Communications, Vol. 6, 8014, 14.08.2015.

Research output: Contribution to journalArticle

Devaraj, A, Gu, M, Colby, R, Yan, P, Wang, CM, Zheng, JM, Xiao, J, Genc, A, Zhang, JG, Belharouak, I, Wang, D, Amine, K & Thevuthasan, S 2015, 'Visualizing nanoscale 3D compositional fluctuation of lithium in advanced lithium-ion battery cathodes', Nature Communications, vol. 6, 8014. https://doi.org/10.1038/ncomms9014
Devaraj, A. ; Gu, M. ; Colby, R. ; Yan, P. ; Wang, C. M. ; Zheng, J. M. ; Xiao, J. ; Genc, A. ; Zhang, J. G. ; Belharouak, I. ; Wang, D. ; Amine, K. ; Thevuthasan, S. / Visualizing nanoscale 3D compositional fluctuation of lithium in advanced lithium-ion battery cathodes. In: Nature Communications. 2015 ; Vol. 6.
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