▎ 摘　　要

NOVELTY - Preparing a cathode of a metal lithium battery comprises (i) carrying out transesterifying cyclodextrin substance and cyanoacrylate in anhydrous solvent under the anhydrous condition to obtain the solution containing ester exchange product; and (ii) coating the solution of the transesterification product on the surface of the cathode foil and drying to obtain the cathode containing the protective layer and the cyclodextrin substance comprises at least one of cyclodextrin or its derivatives. USE - The method is useful for preparing cathode of metal lithium battery. ADVANTAGE - The method: produces cathode which can improve the cycle performance of the battery under the condition of high capacity density, good compatibility and inhibit the growth of lithium dendrites and side reaction between the electrolyte and the metal lithium; initiates anionic polymerization by lithium or a small amount of water in the air; and promotes lithium ion penetration and deposition of lithium ions on the surface of cathode foil. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a cathode of a metal lithium battery, prepared as mentioned above; and (2) a lithium secondary battery.