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Scalable dry processing of solid-state battery cathode composites via high-intensity mixing and assisted fluidized beds
Citation Link: https://doi.org/10.15480/882.19033
Publikationstyp
Journal Article
Date Issued
2027-01-15
Sprache
English
TORE-DOI
Journal
Volume
485
Issue
P2
Article Number
123155
Citation
Powder Technology 485 (P2): 123155 (2027)
Publisher DOI
Publisher
Elsevier
Peer Reviewed
true
This study investigates the scalable mixing capability of a vibration jet-assisted fluidized bed as well as a high-intensity mixer for the dry mixing of cathode composites for solid-state battery (SSB) cathodes. Despite having different working principles, both processes yield comparable microstructural and thus electrochemical results, proving their applicability for SSB manufacturing. Correlating structural analysis via SEM image analysis with electrochemical data reveals that the discharge capacity is mainly governed by the comminution of the solid electrolyte Li3InCl6 (LIC) and the homogeneity of the microstructure which ultimately determines the heterocontact number between active material and the ionic and electronic network. For both processes the stress intensity is identified as the main cause for comminution of LIC and deagglomeration of the active material LiFePO4 (LFP) and conductive additive carbon black (CB). An inverse relationship between electronic and ionic percolation is found: the mixing process disrupts long range electronic percolation due to CB deagglomeration and LIC comminution, whereas the smaller solid electrolyte particle size significantly increases the ionic percolation and therefore cell capacity. Overall, this study proves that both processes are promising for an up-scaled dry mixing process of SSB cathode materials.
Subjects
Solid-state batteries
Dry processing
Scalable mixing
Assisted fluidized bed
Highintensity mixing
Cathode composites
DDC Class
621.3: Electrical Engineering, Electronic Engineering
660.2: Chemical Engineering
Publication version
publishedVersion
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