All-solid-state battery Ball milling Ball-milled Capacity optimization Cathode performance Cathodes Chlorine compounds Composite cathode Glass ceramics Glass-ceramic solid electrolyte Glass-ceramics Lithium compounds Milling (machining) Milling time Particles sizes Phosphorus compounds Solid electrolytes Solid state devices Solid-State Batteries Sulfide-based solid electrolytes Sulfur compounds all-solid-state battery ball milling capacity optimization composite cathode glass-ceramic solid electrolyte