Nitrogen-doped sulfide-based solid electrolyte for all-solid batteries
The present invention relates to a nitrogen-doped sulfide-based solid electrolyte for all-solid batteries. The a nitrogen-doped sulfide-based solid electrolyte for all-solid batteries includes a compound with an argyrodite-type crystal structure represented by the following Formula 1: Li a PS b N c X d [Formula 1] wherein 6≤a≤7, 3<b<6, 0<c≤1, 0<d≤2, and each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I).
1. A solid electrolyte for all-solid batteries comprising:
a compound represented by the following Formula±3:
Li 6 PS 5−1.5b N b X[Formula 3]
wherein in Formula 3, 0.5≤b≤0.75; and
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 has an argyrodite-type crystal structure.
2. An all-solid battery comprising:
a cathode;
an anode; and
a solid electrolyte layer interposed between the cathode and the anode,
wherein at least one of the cathode, the anode and the solid electrolyte layer comprises a solid electrolyte of claim 1 .
3. A method of manufacturing a solid electrolyte for all-solid batteries comprising:
providing a mixture of Li 2 S, P 2 S 5 , LiX and Li 3 N;
grinding the mixture;
and heat-treating the mixture to obtain a compound having an argyrodite-type crystal structure,
wherein the compound is represented by the following Formula 3:
Li 6 PS 5−1.5b N b X[Formula 3]
wherein in Formula 3, 0.5≤b≤0.75;
wherein each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I).
4. A vehicle comprising an all-solid battery of claim 2 .