Preparation method and application of interpenetrating solid electrolyte interface

The invention belongs to the technical field of battery materials, and relates to a preparation method and application of an interpenetrating solid electrolyte interface. A lithium metal pole piece is soaked in a lithium polysulfide plating solution to prepare a lithium sulfide plating layer after being prepared into a lithium oxide plating layer in an air atmosphere, and then the lithium sulfide/lithium oxide interpenetrating type artificial solid electrolyte interface is obtained through normal-temperature drying. A double-layer artificial SEI structure is designed through a simple chemical oxidation reduction method, so that the problems of volume expansion, non-uniform lithium deposition, lithium dendrite growth, low coulombic efficiency, poor long-cycle stability and the like of a lithium metal negative electrode in circulation are solved, and the application effect of the lithium metal negative electrode in a lithium ion battery is improved. 本发明属于电池材料技术领域，涉及一种互穿型固态电解质界面的制备方法和应用。本发明通过将锂金属极片在空气气氛下制备氧化锂镀层后