▎ 摘　　要

NOVELTY - Membrane comprises a base film layer (1) and a ceramic coating (2). The base film layer includes a first base film layer and a second base film layer. The ceramic coating is arranged between the first base film layer and the second base film layer. The composition of the ceramic coating includes an adhesive (3) and ceramics, and the mass ratio of the adhesive and the ceramics is less than 0.08. USE - The membrane is useful for battery (claimed). ADVANTAGE - The base film layer provides support to the ceramic coating to offset a part of the gravity of the ceramic, reduces the dependence of ceramics on the adhesion provided by adhesives, avoids the problem of requiring a large amount of adhesive due to the complete reliance on adhesive force to counteract the gravity of ceramics, effectively reduces the amount of adhesive, avoids adhesive to block the first base film layer and the second base film layer, solves the problem that the adhesive blocks the micropores of the separator and reduces the electrochemical performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing membrane. DESCRIPTION OF DRAWING(S) - The drawing shows a structural schematic view of membrane. 1Base film layer 2Ceramic coating 3Adhesive