Sulfide solid electrolyte and battery
AssigneeMitsui Mining & Smelting Co., Ltd.
InventorsTsukasa Takahashi, Takahiro Ito, Takashi Chikumoto, Teruaki Yagi
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Abstract
A novel sulfide solid electrolyte containing Li, P, S, and a halogen, which can be used as a solid electrolyte for a lithium secondary battery or the like, and is able to suppress the generation of a hydrogen sulfide gas even when exposed to moisture in the atmosphere. The sulfide solid electrolyte comprises a crystal phase or a compound having an argyrodite-type structure and containing Li, P, S, and a halogen; and a compound composed of Li, Cl, and Br and having a peak at each position of 2θ=29.1°±0.5° and 33.7°±0.5° in an X-ray diffraction pattern.
Claims13
A sulfide solid electrolyte comprising
- a compound, referred to as “component A”, having an argyrodite-type structure and containing a lithium (Li) element, a phosphorus (P) element, a sulfur (S) element, and a halogen (X) element, and
- a compound, referred to as, “component B”, composed of a lithium (Li) element, a chlorine (Cl) element, and a bromine (Br) element and having a peak at each position of 2θ=29.1°±0.5° and 33.7°±0.5° in an X-ray diffraction pattern measured by an X-ray diffraction apparatus (XRD) using CuKα1 rays,
- wherein, when an intensity of a peak located at 2θ=30.2°±0.5° is defined as IA and an intensity of a peak located at 2θ=29.1°±0.5° is defined as IB, in an X-ray diffraction pattern measured by the X-ray diffraction apparatus (XRD) using CuKα1 rays, a ratio, Ia/IB of IA to IB satisfies 0<IA/IB≤3.5.
Dependencies are inferred from the claim text.