TY  - JOUR
AU  - Schuer, Annika R.
AU  - Kuenzel, Matthias
AU  - Zarrabeitia, Maider
AU  - Eisenmann, Tobias
AU  - Li, Chengping
AU  - Indris, Sylvio
AU  - Knapp, Michael
AU  - Baran, Volodymyr
AU  - Gilles, Ralph
AU  - Geiger, Dorin
AU  - Kaiser, Ute
AU  - Scheitenberger, Philipp
AU  - Lindén, Mika
AU  - Axmann, Peter
AU  - Wohlfahrt-Mehrens, Margret
AU  - Passerini, Stefano
AU  - Bresser, Dominic
TI  - Bulk and Surface Reactivity of LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> in Contact with (Acidic) Water 
JO  - Advanced energy & sustainability research
VL  - 7
IS  - 1
SN  - 2699-9412
CY  - Weinheim
PB  - Wiley-VCH
M1  - PUBDB-2025-04806
SP  - e202500101
PY  - 2025
AB  - Lithium-ion battery cathode materials such as LiNi0.5Mn1.5O4 (LNMO) are very sensitive to water, which has so far hindered the successful commercialization of aqueous electrode processing strategies. Herein, a detailed investigation of the surface and bulk reactivity of ordered LNMO with water and an aqueous solution of phosphoric acid to decipher the reaction mechanism and the impact on the eventual electrochemical behavior is presented. The comprehensive analysis via, for instance, neutron diffraction and synchrotron X-Ray diffraction, X-Ray absorption spectroscopy, magic-angle spinning nuclear magnetic resonance spectroscopy, thermogravimetric analysis coupled with mass spectrometry, high-resolution transmission electron microscopy, and X-Ray photoelectron spectroscopy reveals that the (acidic) water treatment particularly affects a very thin layer at the particle surface, while the bulk material remains largely unaffected. Nonetheless, when processed classically with N-methyl-2-pyrrolidone and polyvinylidene fluoride into electrodes, the significant impact of this layer on the electrochemical behavior highlights the important impact of the material surface on the eventually achievable performance in battery cells.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1002/aesr.202500101
UR  - https://bib-pubdb1.desy.de/record/640484
ER  -