The commercialization of all-solid-state lithium batteries (ASSBs) hinges on synthesizing and dispersing solid electrolytes—particularly sulfide-based argyrodites ($\text{Li}_6\text{PS}_5\text{Cl}$) and garnet-type oxides ($\text{LLZO}$)—down to sub-micron dimensions without degrading ionic conductivity. While sub-micron particle sizing ($D_{50} < 300\text{ nm}$) is mandatory to eliminate interfacial contact resistance and close void spaces between composite cathodes and soli