Solid electrolyte membrane and all-solid-state battery comprising the same
A solid electrolyte membrane and an all-solid-state battery comprising the same are provided. The solid electrolyte membrane comprises a solid electrolyte in the form of particles and an additive having a linear structure.
1 . A solid electrolyte membrane for an all-solid-state battery, the solid electrolyte membrane comprising a solid electrolyte in the form of particles and an additive having a linear structure,
wherein the additive having a linear structure is at least one selected from the group consisting of polyphenylene sulfide, polyetheretherketone, polyethyleneterephthalate, polysulfone, polyacrylonitrile, polyethylene, and polypropylene,
wherein the additive having a linear structure has an average length of 500 nm to 1 mm, and an average diameter of 50 nm to 5 μm, and a ratio of the average length to the average diameter of 10 to 200.
2 . The solid electrolyte membrane according to claim 1 , wherein the additive having a linear structure is in the form of a polymer fiber.
3 . The solid electrolyte membrane according to claim 1 , wherein the additive having a linear structure is contained in an amount of 0.5 to 5% by weight based on the total weight of the solid electrolyte membrane.
4 . The solid electrolyte membrane according to claim 1 , wherein the solid electrolyte is a sulfide-based solid electrolyte or a polymer-based solid electrolyte.
5 . The solid electrolyte membrane according to claim 1 , wherein a thickness of the solid electrolyte membrane is 5 μm to 50 μm.
6 . The solid electrolyte membrane according to claim 1 , wherein an ion conductivity of the solid electrolyte membrane is 0.01 mS/cm to 10 mS/cm.
7 . An all-solid-state battery comprising a positive electrode, a negative electrode, and the solid electrolyte membrane according to claim 1 between the positive electrode and the negative electrode.