▎ 摘　　要

NOVELTY - The liquid metal coating comprises a liquid metal layer of a gallium-based alloy that is liquid at room temperature. The liquid metal coating is used for the negative electrode coating of a lithium-free metal lithium battery. The gallium-based alloy includes gallium-tin alloy or gallium-indium-tin alloy. The liquid metal coating is coated on the current collector, the coating thickness is less than 500 nm, and the liquid metal loading is less than 0.2 mg/cm2. The current collector includes a metal current collector or a non-metallic current collector. The metal current collector includes copper, nickel, titanium, platinum, stainless steel, constantan and alloy materials. The non-metal current collector includes carbon film, carbon cloth, carbon paper, carbon fiber, graphene, MXene, conductive polymer non-metal material. USE - Liquid metal coating for use in lithium-free negative electrode used in lithium-free metal lithium battery (all claimed). ADVANTAGE - The liquid metal coating makes the nucleation morphology of metal lithium on the negative electrode current collector more ordered due to the influence of the liquid metal coating, which promotes the lithium growth more densely and uniformly at the negative electrode. The improved growth behavior reduces the contact area between the metal lithium anode and the electrolyte, thus reducing the amount of irreversible side reactions at the interface, reducing the loss of reversible lithium resources in each charge-discharge cycle, and effectively improving lithium-free metal. The coulombic efficiency of the lithium negative electrode is improved, and the cycle stability of the battery is improved. The higher capacity retention rate enables the battery to still provide higher capacity after multiple cycles, which is very positive for the commercial application of anode-free lithium metal batteries. The preparation method of the liquid metal coating is simple in process, and has good compatibility with the existing battery assembly process, and is very easy to realize large-scale production and application. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a lithium-free negative electrode; (2)a lithium-free negative electrode preparation method; (3) a lithium-free metal lithium battery. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical representation illustrating the comparison of charge-discharge curves of high-energy-density lithium secondary battery with negative electrode having liquid metal coating and the lithium secondary battery. (Drawing includes non-English language text)