Sulfide-Based Solid Electrolyte for Lithium Secondary Battery
원문보기
IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
H01M-010/0562
H01M-010/0525
H01B-001/10
출원번호
16309136
(2017-05-16)
공개번호
20190312304
(2019-10-10)
우선권정보
JP-2016-131523 (2016-07-01)
국제출원번호
PCT/JP2017/018404
(2017-05-16)
발명자
/ 주소
Uesugi, Hideo
Miyashita, Norihiko
Ide, Hitohiko
Ito, Takahiro
Chikumoto, Takashi
Muranaka, Takashi
출원인 / 주소
Uesugi, Hideo
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
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 electr
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.
대표청구항▼
1. 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-arg
1. 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. 2. The sulfide-based solid electrolyte for a lithium secondary battery according to claim 1, wherein the compound having a non-argyrodite-type crystal structure constitutes a PS4-ROR (0≤R≤4) unit structure in the structure. 3. The sulfide-based solid electrolyte for a lithium secondary battery according to claim 1, wherein the compound having a non-argyrodite-type crystal structure comprises a compound represented by a compositional formula: Li3PS4-ROR (0≤R<4) as a main phase. 4. The sulfide-based solid electrolyte for a lithium secondary battery according to claim 1, wherein the compound having a cubic argyrodite-type crystal structure is represented by a compositional formula: Li7-x-2yPS6-x-yHax (where Ha represents halogen and is at least one kind of element of fluorine (F), chlorine (Cl), bromine (Br), and iodine (I)), and satisfies 0.4≤x≤1.7 and −0.9≤y≤−x+2 in the compositional formula. 5. The sulfide-based solid electrolyte for a lithium secondary battery according to claim 4, wherein the halogen is one of chlorine (Cl) or bromine (Br). 6. A lithium secondary battery comprising the sulfide-based solid electrolyte for a lithium secondary battery according to claim 1. 7. A method of producing a sulfide-based solid electrolyte for a lithium secondary battery, wherein a compound containing lithium, phosphorus, sulfur, and halogen, and having a cubic argyrodite-type crystal structure, and a phosphorus sulfide or a phosphorus oxide, or both of these having a ratio of 0.1 to 42 mol in total relative to 100 mol of the compound are mixed, and heated at a temperature of 100 to 300° C. in an inert atmosphere. 8. The method of producing a sulfide-based solid electrolyte for a lithium secondary battery according to claim 7, wherein the compound having a cubic argyrodite-type crystal structure is represented by a compositional formula: Li7-x-2yPS6-x-yHax (where Ha represents halogen and is at least one kind of element of fluorine (F), chlorine (Cl), bromine (Br), and iodine (I)), and satisfies 0.4≤x≤1.7 and −0.9≤y≤−x+2 in the compositional formula. 9. The sulfide-based solid electrolyte for a lithium secondary battery according to claim 2, wherein the compound having a non-argyrodite-type crystal structure comprises a compound represented by a compositional formula: Li3PS4-ROR (0≤R<4) as a main phase. 10. The sulfide-based solid electrolyte for a lithium secondary battery according to claim 2, wherein the compound having a cubic argyrodite-type crystal structure is represented by a compositional formula: Li7-x-2yPS6-x-yHax (where Ha represents halogen and is at least one kind of element of fluorine (F), chlorine (Cl), bromine (Br), and iodine (I)), and satisfies 0.4≤x≤1.7 and −0.9≤y≤−x+2 in the compositional formula. 11. The sulfide-based solid electrolyte for a lithium secondary battery according to claim 3, wherein the compound having a cubic argyrodite-type crystal structure is represented by a compositional formula: Li7-x-2yPS6-x-yHax (where Ha represents halogen and is at least one kind of element of fluorine (F), chlorine (Cl), bromine (Br), and iodine (I)), and satisfies 0.4≤x≤1.7 and −0.9≤y≤−x+2 in the compositional formula. 12. A lithium secondary battery comprising the sulfide-based solid electrolyte for a lithium secondary battery according to claim 2. 13. A lithium secondary battery comprising the sulfide-based solid electrolyte for a lithium secondary battery according to claim 3. 14. A lithium secondary battery comprising the sulfide-based solid electrolyte for a lithium secondary battery according to claim 4. 15. A lithium secondary battery comprising the sulfide-based solid electrolyte for a lithium secondary battery according to claim 5. 16. The method of producing a sulfide-based solid electrolyte for a lithium secondary battery according to claim 8, wherein the halogen is one of chlorine (Cl) or bromine (Br).
※ AI-Helper는 부적절한 답변을 할 수 있습니다.