Phosphorus sulfide composition for sulfide-based inorganic solid electrolyte material
Provided is a phosphorus sulfide composition for a sulfide-based inorganic solid electrolyte material, the phosphorus sulfide composition including P 4 S 10 and P 4 S 9 , in which when a total content of P 4 S 10 , P 4 S 9 , P 4 S 7 , and P 4 S 3 in the phosphorus sulfide composition is represented by 100 mass %, a content of P 4 S 10 calculated from a solid 31 P-NMR spectrum is 70 mass % or more and 99 mass % or less.
1. A phosphorus sulfide composition for sulfide-based inorganic solid electrolyte material, the phosphorus sulfide composition comprising:
P 4 S 10 and P 4 S 9 , and
optionally, P 4 S 7 and/or P 4 S 3 ;
wherein when a total content of P 4 S 10 , P 4 S 9 , P 4 S 7 , and P 4 S 3 in the phosphorus sulfide composition is represented by 100 mass %,
a content of the P 4 S 10 calculated from a solid 31 P-NMR spectrum is 70 mass % or more and 99 mass % or less,
when a solid 31 P-NMR spectrum is measured, a peak is not observed in a range of 80 ppm or more and 90 ppm or less, and
a content of the P 4 S 9 calculated from a solid 31 P-NMR spectrum is 1 mass % or more and 30 mass % or less.
2. The phosphorus sulfide composition according to claim 1 ,
wherein a total content of P 4 S 10 and P 4 S 9 is 95 mass % or more.
3. A raw material composition of a sulfide-based inorganic solid electrolyte material, the raw material composition comprising:
the phosphorus sulfide composition according to claim 1 ; and
lithium sulfide.
4. A sulfide-based inorganic solid electrolyte material that is obtained by using the phosphorus sulfide composition according to claim 1 as a raw material.
5. A solid electrolyte comprising the sulfide-based inorganic solid electrolyte material according to claim 4 .
6. A solid electrolyte membrane comprising the solid electrolyte according to claim 5 as a main component.
7. A lithium ion battery comprising:
a positive electrode including a positive electrode active material layer;
an electrolyte layer; and
a negative electrode including a negative electrode active material layer,
wherein at least one of the positive electrode active material layer, the electrolyte layer, and the negative electrode active material layer includes the sulfide-based inorganic solid electrolyte material according to claim 4 .
8. A method of manufacturing a sulfide-based inorganic solid electrolyte material, the method comprising a step of mechanically processing the raw material composition of the sulfide-based inorganic solid electrolyte material according to claim 3 .
9. The method of manufacturing a sulfide-based inorganic solid electrolyte material according to claim 8 ,
wherein the method comprising a step of crystalizing at least a part of the sulfide-based inorganic solid electrolyte material by heating the obtained sulfide-based inorganic solid electrolyte material in a range of 220° C. or higher and 350° C. or lower.