L. Pérez Ramírez work on in situ HAXPES characterization of all-solid-state batteries (ASSBs) has just been published in Materials Today Communications. This article assesses the interfacial stability between β-Li3PS4 (LPS) solid state electrolyte and deposited lithium metal using in situ hard X-ray photoemission spectroscopy (HAXPES) approach. We show that the introduction of a 4 nm-thick Al2O3 interlayer grown by Atomic Layer Deposition (ALD) enhances the interfacial stability by mitigating undesirable side reactions. By comparing the two systems, LPS /Li and LPS/Al2O3/Li, we highlight the importance of interface engineering in solid-state batteries, particularly through protective coatings like Al2O3 made by ALD, which can enhance the stability of sulfide-based solid electrolytes against lithium metal.
Experiments were performed at the GALAXIES beamline at SOLEIL Synchrotron during Lucía’s postdoc, under Proposal #20211057. The authors acknowledge the French National Research Agency (ANR) for its support through Labex STORE-EX project (ANR-10LABX-76–01).
Read more: https://doi.org/10.1016/j.mtcomm.2026.115388
