Nitrogen-doped sulfide-based solid electrolyte for all-solid batteries

A method of manufacturing a solid electrolyte for all-solid batteries comprising:

• providing a mixture of Li2S, P2S5, LiX and Li3N;
• grinding the mixture;
• and
• heat-treating the mixture to obtain a compound having an argyrodite-type crystal structure, wherein each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I),
• wherein the compound is represented by the following Formula 4:
• Li7PS6−2cNcXc [Formula 4]
• wherein in Formula 4.0<c≤1;
• and
• each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I).