Solid electrolyte membrane, preparation method of solid electrolyte membrane and lithium ion battery

The invention discloses a solid electrolyte membrane of a lithium ion battery, and relates to the field of lithium ion batteries. The solid electrolyte membrane is composed of a glass ceramic electrolyte and a coating layer with which the surface of the glass ceramic electrolyte is coated. The coating layer is prepared from lithium salt and a polymer material at the molar ratio of 1:5-1:10. The electrolyte membrane can reduce the interface impedance of the full-solid-state lithium ion battery to a great extent, so that the cycling stability of the full-solid-state lithium ion battery is improved, and the service life of the full-solid-state lithium ion battery is prolonged. The invention further discloses a preparation method of the solid electrolyte membrane and the full-solid-state lithium ion battery comprising the solid electrolyte membrane. The solid electrolyte membrane of the lithium ion battery is high in mechanical strength and excellent in electrochemical performance, and meanwhile the preparation t