Lithium metal three-dimensional porous material, secondary battery, and electric device

Abstract

The application discloses a lithium metal three-dimensional porous material, a secondary battery and an electric device, and belongs to the technical field of secondary batteries.The lithium metal three-dimensional porous material comprises a substrate layer and a polymer layer which is at least partially coated on the periphery of the substrate layer; the substrate layer comprises a three-dimensional conductive metal and lithium metal filled in the three-dimensional conductive metal.The lithium metal three-dimensional porous material has the characteristics of high specific surface area and high interface stability, can effectively improve the energy density of the secondary battery, and has excellent mechanical stability, good solubility of lithium salt, and can effectively increase the interface stability.The polymer layer can isolate the direct contact between the lithium metal and the electrolyte, reduce the side reaction of the contact between the lithium metal and the electrolyte, the substrate layer provides high-activity deposition sites and sufficient deposition space for lithium ions in the charging process, and effectively improves the rate performance and cycle performance of the secondary battery.

Images