electrolyte. There is no limitation on the type of ion conductor of the
solid electrolyte. It can be a lithium fast ion conductor, which uses
lithium ions as carriers, Can also be sodium fast ion conductor (with
sodium ion as a carrier), potassium fast ion conductor (with
potassium ion as a carrier), magnesium fast ion conductor (with
magnesium ion as a carrier), or zinc Fast ion conductor (with zinc
ions as carriers).
[0060] The type of the solid electrolyte is not limited, and an existing
type of solid electrolyte may be used, and an ion conductor having
improved structure and composition control of different types of
electrolytes is also included. Solid electrolytes include inorganic solid
electrolytes and organic polymer solid electrolytes. Inorganic solid
electrolytes mainly include sulfides (such as Li2S, SiS2, etc.), oxides
(such as P2O5, B2O3, SiO2, or Li2O, etc.), and sulfur oxides (such
as LiS -SiS2 is doped with a small amount of Li3PO4, LiAlO2 or
Li2SiO3, etc.) and nitrogen oxides (such as LiPON, LiSiPON or
LiSON) and the like.
[0061] Sulfide solid electrolytes include a halogen-doped Li2S-X
binary system and / or a halogen-doped Li2S-MeS2-P2S5 ternary
system. Halogen represents Cl, Br, or I, and X represents P2S5,
SiS2, GeS2, B2S3, or Al2S4. Me stands for Si, Ge, Sn or Al. As
examples, the sulfide solid electrolyte can be Li2S-SiS2, Li2S-P2S5-
LiCl, Li2S-P2S5-H2S-LiCl, LiI-Li2S-SiS2, LiI-Li2S-P2S5, Li2S-LiBr-
P2S5, LiI-Li2S-P2O5, Li2S-P2S5-SiS2, LiI-Li3PO4-P2S5, Li2S-Li2O-
P2S5, Li2S-P2S5-SnS, Li2S-P2S5-Al2S3, Li2S-GeS2, Li2S-Li2S-
ZnS, Li2S-Ga2S3, Li2S-GeS2-P2S5, Li2S-GeS2-Ga2S3, Li2S-P2S5
or Li3PS4, etc.
[0062] The crystal type of the oxide solid electrolyte is not limited,
including but not limited to LiPON type (lithium phosphorus
oxynitride), perovskite type (ABO3 type, such as La0.55Li0.35TiO3),
NASICON type (such as LiTi2P3O12), and LISICON type ( For
example, Li3.5Zn0.25GeO4) or a garnet-type solid electrolyte (for
example, Li7La3Zr2O12 (Li6.5La3Zr1.75Te0.25O12)) is preferably a
garnet-type solid electrolyte.