SOLID-STATE BATTERIES WITH SILICON ANODE AND SULFIDE ION CONDUCTOR

All-solid-state batteries based on silicon anodes and sulfide ion conductors are disclosed. The silicon anode includes silicon particles that are coated with LiPSCl and mixed with carbon black. The silicon anode is made by mixing silicon particles with LiS and PSin a solvent, removing the solvent, annealing the silicon particles coated with LiPSCl, and ball milling the silicon particles coated with LiPSCl with LiPSCl and carbon black. Also disclosed herein is a battery comprising an anode made of silicon particles coated with LiPSCl and mixed with carbon black, a cathode that includes a metal coated with LiSiOwherein X is from 2.9 to 3.0, and a solid electrolyte membrane separating the anode and the cathode. Methods of making the battery and the cathode are also disclosed herein.