Room temperature fabrication of battery components via Powder Aerosol Deposition

Titelangaben

Sozak, Mutlucan ; Hennerici, Lukas ; Schamel, Maximilian ; Linz, Mario ; Knies, Sofie ; Kita, Jaroslaw ; Bianchini, Matteo ; Danzer, Michael A. ; Moos, Ralf:
Room temperature fabrication of battery components via Powder Aerosol Deposition.
2024
Veranstaltung: 16th International Battery Conference , April 10-11, 2024 , Münster, Germany.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung , Poster )

Angaben zu Projekten

Abstract

All-solid-state batteries (ASSBs) may counteract the limitations of well-established lithium-ion batteries. ASSBs utilize a solid electrolyte (SE) instead of a liquid one, allowing for the use of high- capacity alkali metals like lithium as anode without additives providing higher energy densities. However, liquid electrolytes can penetrate to electrode materials yielding increased wettability. Herein, a critical challenge for ASSBs lies in achieving optimal contact between the solid electrolyte and the electrodes. The issue of interfacial contact leads to high impedance and slow ion transport at the interface of SE and cathode. The powder aerosol deposition method (PAD) emerges as a novel method to address this challenge in ASSB fabrication. PAD enables direct deposition of ceramic powders completely at room temperature resulting in dense functional films in the micron thickness range, offering considerable flexibility in terms of the cell design. Individual components, such as cathode active materials (CAMs), and solid electrolytes, can be deposited either sequentially or simultaneously, e.g. composite cathodes, on current collectors, promoting excellent interfacial contact between them. This study explores the potential of PAD for fabricating individual sodium-based SEs and CAMs. We demonstrate the cycling performance of PAD produced Na-based cathodes and present an all-solid- state lithium battery (Li-ASSB) fabricated via PAD. We performed scanning electron microscopy (SEM) of cross-sections, revealing the microstructure of individual layers and the Li-ASSB itself. The results demonstrate the potential of PAD as a manufacturing method for both sodium (Na) and lithium (Li) based ASSBs, offering a promising solution to overcome the main hurdles of interfacial contacts between the battery components hindering the advancement of solid-state battery technology.