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SULFIDE SOLID ELECTROLYTE
To provide a sulfide solid electrolyte material which does not include Ge and which has excellent electrochemical stability and high lithium ion conductivity. A sulfide solid electrolyte, including a sulfide-based solid electrolyte represented by the composition formula: Li 4-4z-x [Sn y Si 1-y ] 1+z-x P x S 4 (where 0.5 ¤ x ¤ 0.6, y = 0.2, and 0 ¥ z ¥ -0.2), wherein the sulfide solid electrolyte has a peak at position 2¸ = 29.58° ± 0.50° in X-ray diffraction measurement using CuK± radiation and does not have a peak at position 2¸ = 27.33° ± 0.50° in X-ray diffraction measurement using CuK± radiation, or when the sulfide solid electrolyte has a peak at the position 2¸ = 27.33° ± 0.50°, the value of I B /I A is less than 0.50 (where I A is the diffraction intensity of the 2¸ = 29.58° ± 0.50° peak and I B is the diffraction intensity of the 2¸ = 27.33° ± 0.50° peak).
SULFIDE SOLID ELECTROLYTE
To provide a sulfide solid electrolyte material which does not include Ge and which has excellent electrochemical stability and high lithium ion conductivity. A sulfide solid electrolyte, including a sulfide-based solid electrolyte represented by the composition formula: Li 4-4z-x [Sn y Si 1-y ] 1+z-x P x S 4 (where 0.5 ¤ x ¤ 0.6, y = 0.2, and 0 ¥ z ¥ -0.2), wherein the sulfide solid electrolyte has a peak at position 2¸ = 29.58° ± 0.50° in X-ray diffraction measurement using CuK± radiation and does not have a peak at position 2¸ = 27.33° ± 0.50° in X-ray diffraction measurement using CuK± radiation, or when the sulfide solid electrolyte has a peak at the position 2¸ = 27.33° ± 0.50°, the value of I B /I A is less than 0.50 (where I A is the diffraction intensity of the 2¸ = 29.58° ± 0.50° peak and I B is the diffraction intensity of the 2¸ = 27.33° ± 0.50° peak).
SULFIDE SOLID ELECTROLYTE
KANNO RYOJI (author) / HIRAYAMA MASAAKI (author) / SUZUKI KOTA (author) / SUN YULONG (author)
2019-03-07
Patent
Electronic Resource
English