Journal Article

IMPULSE-2025-00084

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Bulk and Surface Reactivity of LiNi$_{0.5}$Mn$_{1.5}$O$_{4}$ in Contact with (Acidic) Water

Schuer, A. R. ; Kuenzel, M. ; Zarrabeitia, M. ; Eisenmann, T. ; Li, C. ; Indris, S. ; Knapp, M. ; Baran, V. ; Gilles, R.MLZ* ; Geiger, D. ; Kaiser, U. ; Scheitenberger, P. ; Lindén, M. ; Axmann, P. ; Wohlfahrt-Mehrens, M. ; Passerini, S. ; Bresser, D. (Corresponding author)

2025
Wiley-VCH Weinheim

Please use a persistent id in citations: doi:10.1002/aesr.202500101

Abstract: Lithium-ion battery cathode materials such as LiNi0.5Mn1.5O4 (LNMO) are verysensitive to water, which has so far hindered the successful commercialization ofaqueous electrode processing strategies. Herein, a detailed investigation of thesurface and bulk reactivity of ordered LNMO with water and an aqueous solutionof phosphoric acid to decipher the reaction mechanism and the impact on theeventual electrochemical behavior is presented. The comprehensive analysis via,for instance, neutron diffraction and synchrotron X-Ray diffraction, X-Rayabsorption spectroscopy, magic-angle spinning nuclear magnetic resonancespectroscopy, thermogravimetric analysis coupled with mass spectrometry, highresolutiontransmission electron microscopy, and X-Ray photoelectron spectroscopyreveals that the (acidic) water treatment particularly affects a very thinlayer at the particle surface, while the bulk material remains largely unaffected.Nonetheless, when processed classically with N-methyl-2-pyrrolidone and polyvinylidenefluoride into electrodes, the significant impact of this layer on theelectrochemical behavior highlights the important impact of the material surfaceon the eventually achievable performance in battery cells.

Keyword(s): Energy (1st) ; Materials Science (2nd)

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Contributing Institute(s):

1. ADVMAT (ADVMAT)

Research Program(s):

1. BMBF 03XP0255 - ExZellTUMIII - Exzellenzzentrum für Batteriezellen an der Technischen Universiät München (03XP0255) (03XP0255)

Experiment(s):

1. SPODI: High resolution powder diffractometer (SR8a)

Appears in the scientific report 2025

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Database coverage:
; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; DEAL Wiley ; DOAJ Seal ; Emerging Sources Citation Index ; Fees ; IF >= 5 ; JCR ; SCOPUS ; Web of Science Core Collection

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