Sulfide solid electrolyte
AssigneeIdemitsu Kosan Co., Ltd.
InventorsFutoshi Utsuno, Kota Terai
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Abstract
A sulfide solid electrolyte containing lithium, phosphorus, sulfur; and one or more of elements X selected from the group consisting of halogen elements and chalcogen elements excluding sulfur, wherein the sulfide solid electrolyte includes an argyrodite-type crystal structure, and wherein a molar ratio of the lithium to the phosphorus, a (Li/P), a molar ratio of the sulfur to the phosphorus, b (S/P), and a molar ratio of the element X to the phosphorus, c (X/P), satisfy formulas (1) to (3): 5.0≤a≤7.1 (1) 1.0<a−b≤1.5 (2) 6.5≤a+c<7.1 (3) wherein b>0 and c>0 are satisfied.
Claims22
A sulfide solid electrolyte, comprising lithium, phosphorus, sulfur and at least one element X selected from the group consisting of a halogen element and a chalcogen element excluding sulfur, wherein:
- the sulfide solid electrolyte comprises an argyrodite-type crystal structure;
- a molar ratio of the lithium to the phosphorus, A (Li/P), a molar ratio of the sulfur to the phosphorus, B (S/P), and a molar ratio of the element X to the phosphorus, C (X/P), satisfy
- formulas (1) to (3):
- 5.0≤A≤7.1 (1)
- 1.0<A−B≤1.5 (2)
- 6.5≤A+C<7.1 (3);
- and
- B>0 and C>0.
Dependencies are inferred from the claim text.