Solid electrolyte membrane, method for manufacturing same, and all-solid-state battery comprising same

A solid electrolyte membrane for a solid-state battery, comprising:

• a polymer electrolyte material;
• and
• a hydrophilic surface-modified porous polymer sheet,
• wherein the hydrophilic surface-modified porous polymer sheet comprises a porous material having a plurality of pores wherein the pores are configured to be penetrated by flowable materials,
• the polymer electrolyte material forms a composite with the hydrophilic surface-modified porous polymer sheet, wherein the pores of the hydrophilic surface-modified porous polymer sheet are filled with the polymer electrolyte material,
• wherein the hydrophilic surface-modified porous polymer sheet further comprises an ion channel comprising perforated holes,
• further wherein the polymer electrolyte material is packed in the ion channel of the hydrophilic surface-modified porous polymer sheet and the pores of the hydrophilic surface-modified porous polymer sheet,
• wherein the perforated holes have a diameter of 1-500 μm,
• wherein the polymer electrolyte material comprises a solid electrolyte film, wherein the solid electrolyte film is formed by drying a solvent in a composition comprising a polymer resin added to a solvated lithium salt,
• wherein the hydrophilic surface-modified porous polymer sheet has an upper surface,
• wherein the solid electrolyte membrane is manufactured by disposing the solid electrolyte film on the upper surface of the hydrophilic surface-modified porous polymer sheet and pressurizing it to fill the ion channels and pores of the hydrophilic surface-modified porous polymer sheet with the solid electrolyte film,
• wherein the pressurization is carried out by a pressurization member, and the temperature of the pressurization member is 40° C. to 60° C.,
• wherein the solid electrolyte film shows an ion conductivity of 1×10−7 S/cm or more, and wherein the solid electrolyte membrane for a solid-state battery has a tensile strength of about 500 kgf/cm2 to 2,000 kgf/cm2.