Solid electrolyte
AssigneeMitsui Mining & Smelting Co., Ltd.
InventorsYuki NAKAYAMA, Tsukasa TAKAHASHI
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Abstract
A solid electrolyte contains Li, P, S, halogen, and M elements (M represents at least one of silicon (Si), tin (Sn), antimony (Sb), germanium (Ge), and boron (B)), and has a crystalline phase with an argyrodite-type crystal structure. A molar ratio S/(P+M) of the S to the total of the P and M elements satisfies 3.5<S/(P+M)<4.2. A molar ratio M/P of the M element to the P satisfies 0<M/P<1. A molar ratio X/(P+M) of the halogen (X) element to the total of the P and M elements satisfies 0.7<X/(P+M)<3.0.
Claims11
A solid electrolyte comprising a lithium (Li) element, a phosphorus (P) element, a sulfur (S) element, a halogen (X) element, and an M element (M represents at least one of silicon (Si), tin (Sn), antimony (Sb), germanium (Ge), and boron (B)),
- wherein a molar ratio S/(P+M) of the sulfur (S) element to a total of the phosphorus (P) element and the M element satisfies 3.5<S/(P+M)<4.2,
- a molar ratio M/P of the M element to the phosphorus (P) element satisfies 0<M/P<1, and
- the solid electrolyte has a crystalline phase with an argyrodite-type crystal structure.
The solid electrolyte according to wherein, a ratio Ib/I0 of Ib to I0 is 2.5 or less,
- wherein Ib represents an intensity of a peak B observed at a position 2θ=19.4°±0.3° in an X-ray diffraction pattern measured by an X-ray diffractometer (XRD) using CuKα1 radiation, and
- I0 represents a background of the X-ray diffraction pattern.
Dependencies are inferred from the claim text.