Fig. 1: Schematics of stripping and plating of Li at the Li/LLZO interface.
From: On the interfacial phenomena at the Li7La3Zr2O12 (LLZO)/Li interface

Drawing of the Li/LLZO interface based on a contaminated (a), cleaned (b), and the IL-functionalized (c) LLZO surface for as-prepared interface and after plating and stripping of Li. The figure illustrates key factors affecting Li-ion transport at the Li/LLZO interface, including the presence of voids and cavities (due to insufficient pressing of Li onto the rough LLZO surface), the Li2CO3/LiOH contamination layer (shown in yellow), and the interfacial layer (shown in blue) between metallic Li and LLZO.