Fig. 6: Microstructure of the Li-Ag alloy.

HAADF-STEM images and corresponding overlaid EELS-SI elemental maps of Li and Ag (inset) of a 200-nm-thick Ag|LLZO|Li cell at (a) EoLP and (b) state III. c HAADF-STEM image of a 30-nm-thick Ag|LLZO|Li cell at state III. d SADPs acquired for the Li-Ag alloy region in (a) (left half) and nanosized Li-Ag alloy grain region in (b) (right half). In-situ TEM. e–j Still-cut TEM images and corresponding SADPs (k and l) obtained from the dotted circle area in (e and f) and (h and j), respectively.