▎ 摘　　要

NOVELTY - An ultra-thin metal lithium electrode comprises a current collector layer, and a metal lithium layer, which is coated on the surface of the current collector layer, has a thickness of 1-100 mu m, and includes metal lithium, an additive component and a framework component. The additive component includes an inorganic material with halogen element functional groups on the surface, and/or an inorganic material that is compatible with liquid metal lithium or lithium alloy. The framework component is one-dimensional or two-dimensional structured nanomaterials, which form a three-dimensional network structure inside the metal lithium layer. USE - The ultra-thin metal electrode is useful as cathode of secondary lithium battery (claimed). ADVANTAGE - The ultra-thin metal electrode does not contain excess lithium, is safe, and has high energy density. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of the ultra-thin metal lithium electrode; and (2) a secondary lithium battery, which comprises an anode, ultra-thin metal lithium electrode as a cathode, and a separator used to separate the anode and the cathode.