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Design-of-experiments-guided optimization of slurry-cast cathodes for solid-state batteries

Teo, Jun Hao; Strauss, Florian; Tripković, Đorđije; Schweidler, Simon; Ma, Yuan; Bianchini, Matteo; Janek, Jürgen; Brezesinski, Torsten


Laboratory research into bulk-type solid-state batteries (SSBs) has been focused predominantly on powder-based, pelletized cells and has been sufficient to evaluate fundamental limitations and tailor the constituents to some degree. However, to improve experimental reliability and for commercial implementation of this technology, competitive slurry-cast electrodes are required. Here, we report on the application of an approach guided by design of experiments (DoE) to evaluate the influence of the type/content of polymer binder and conductive carbon additive on the cyclability and processability of Li$_{1+x}$(Ni$_{0.6}$Co$_{0.2}$Mn$_{0.2}$)$_{1}$−xO$_{2}$ (NCM622) cathodes in SSB cells using lithium thiophosphate solid electrolytes. The predictions are verified by charge-discharge and impedance spectroscopy measurements. Furthermore, structural changes and gas evolution are monitored via X-ray diffraction and differential electrochemical mass spectrometry, respectively, in an attempt to rationalize and support the DoE results. In summary, the optimized combination of polymer binder and conductive carbon additive leads to high electrochemical performance and good processability.

Verlagsausgabe §
DOI: 10.5445/IR/1000135247
Veröffentlicht am 17.07.2021
DOI: 10.1016/j.xcrp.2021.100465
Zitationen: 8
Zitationen: 10
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2666-3864
KITopen-ID: 1000135247
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Cell Reports Physical Science
Verlag Elsevier
Band 2
Heft 6
Seiten Art.-Nr.: 100465
Nachgewiesen in Dimensions
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