20 mS cm -1 Li-argyrodite solid electrolyte produced via facile high-speed-mixing.

A novel efficient method is proposed to synthesize a large amount of Li 5.4 PS 4.4 Cl 1.6 precursor in only 5 minutes with a conductivity of 20 mS cm -1 after sintering, which can replace the common ball-milling method. The ASSBs show excellent electrochemical performance with high loading (20 mg cm -2 ) and great capacity retention (80% after 200 cycles). This is important for the industrial production of sulfide solid electrolytes for fabricating Ah-level ASSBs.