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AssigneeMitsui Mining & Smelting Co., Ltd.
InventorsHideo Uesugi, Norihiko Miyashita, Hitohiko Ide, Takahiro Ito, Takashi Chikumoto, Takashi Muranaka
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Provided is a sulfide-based solid electrolyte which is capable of suppressing the generation of hydrogen sulfide caused by reaction with moisture even when in contact with dry air in a dry room or the like, and capable of maintaining lithium ion conductivity. Proposed is a sulfide-based solid electrolyte for a lithium secondary battery, wherein the surface of a compound containing lithium, phosphorus, sulfur, and halogen, and having a cubic argyrodite-type crystal structure is coated with a compound containing lithium, phosphorus, and sulfur, and having a non-argyrodite-type crystal structure.
A sulfide-based solid electrolyte for a lithium secondary battery, wherein the surface of a core compound containing lithium, phosphorus, sulfur, and halogen, and having a cubic argyrodite-type crystal structure is coated with a coating compound containing lithium, phosphorus, and sulfur, and having a non-argyrodite-type crystal structure, and wherein the core compound having a cubic argyrodite-type crystal structure is represented by a compositional formula:
Dependencies are inferred from the claim text.