Sulfur-containing compound, solid electrolyte, and battery
A sulfur-containing compound containing a lithium (Li) element, a phosphorus (P) element, a sulfur (S) element, and a halogen (X) element, which can be suitably used as a solid electrolyte, and is able to suppress the generation of a hydrogen sulfide gas even when exposed to moisture in the atmosphere. The sulfur-containing compound has a peak at each position of 2θ=21.3°±1.0°, 27.8°±1.0°, and 30.8°±0.5° in an X-ray diffraction pattern measured by an X-ray diffraction apparatus (XRD) using CuKα1 rays.
1. A sulfur-containing compound, comprising a lithium (Li) element, a phosphorus (P) element, a sulfur (S) element, and a halogen (X) element, and having a peak at each position of 2θ=21.3°±1.0°, 27.8°±1.0°, and 30.8°±0.5° and at least two peaks, referred to as peak D and peak E, respectively in a range of 2θ=25° or more and 2θ=26.0° or less, in an X-ray diffraction pattern measured by an X-ray diffraction apparatus (XRD) using CuKα1 rays,
wherein the sulfur-containing compound is represented by a general formula of Li a PS b X c , wherein X is at least one of F, Cl, Br, and I, a is in a range of 3.0 or more and 6.0 or less, b is in a range of 3.5 or more and 4.8 or less, and c is in a range of 0.1 or more and 3.0 or less.
2. The sulfur-containing compound according to claim 1 , having at least three peaks, referred to as peak G, peak H, and peak I, respectively, in a range of 2θ=30.0° or more and 31.0° or less, in an X-ray diffraction pattern measured by an X-ray diffraction apparatus (XRD) using CuKα1 rays.
3. The sulfur-containing compound according to claim 1 , comprising a chlorine (Cl) element and a bromine (Br) element as the halogen (X) element.
4. A solid electrolyte, comprising the sulfur-containing compound according to claim 1 .
5. The solid electrolyte according to claim 4 , comprising the sulfur-containing compound as a main component.
6. A battery, having a positive electrode layer, a negative electrode layer, and a solid electrolyte layer between the positive electrode layer and the negative electrode layer, wherein the battery comprises the solid electrolyte according to claim 4 .
7. The sulfur-containing compound according to claim 2 , comprising a chlorine (Cl) element and a bromine (Br) element as the halogen (X) element.
8. A solid electrolyte, comprising the sulfur-containing compound according to claim 2 .
9. The solid electrolyte according to claim 8 , comprising the sulfur-containing compound as a main component.
10. A battery, having a positive electrode layer, a negative electrode layer, and a solid electrolyte layer between the positive electrode layer and the negative electrode layer, wherein the battery comprises the solid electrolyte according to claim 8 .
11. A solid electrolyte, comprising the sulfur-containing compound according to claim 3 .
12. The solid electrolyte according to claim 11 , comprising the sulfur-containing compound as a main component.
13. A battery, having a positive electrode layer, a negative electrode layer, and a solid electrolyte layer between the positive electrode layer and the negative electrode layer, wherein the battery comprises the solid electrolyte according to claim 11 .