“…So far, many new functional separators have shown great potential in practical battery applications. By introducing functional materials coatings on the separator, including polymer materials, carbon-based materials, 9-12 inorganic oxides, 13,14 catalytic polar metal compounds 15 and metal/covalent organic frameworks, [16][17][18][19][20] the specific capacity, cycle stability, multiplier performance, Coulomb efficiency and safety of LSB can be significantly improved. There are two main preparation technologies: one is to use the vacuum suction filtration and barrier layer which were placed on the surface of the PP separator, but this method takes a long time, especially for nanomaterials; the other one would be make a paste of barrier with binder and coat on the PP separator, yet the thickness of the layer cannot be controlled.…”