Lithium-carbonized aluminum-zinc composite lithium metal negative electrode and preparation method and application thereof

Abstract

The application belongs to the technical field of energy storage, and discloses a lithium-aluminum carbide-zinc composite lithium metal negative electrode and a preparation method and application thereof. A multi-phase alloy phase (Li single element, Al single element, LiZn alloy, Li3Al2 alloy and Li2C2) is formed by smelting of metal lithium, aluminum carbide and zinc single element. The lithium-aluminum carbide-zinc composite lithium metal negative electrode enhances the tensile strength and controls lithium stripping and deposition due to the presence of the LiZn alloy, the Li3Al2 alloy and the Al single element. The Li2C2 carbon-containing compound enhances the mechanical toughness of the composite lithium metal negative electrode. Compared with the existing pure lithium metal negative electrode, the lithium-aluminum carbide-zinc composite lithium metal negative electrode greatly improves the tensile strength, essentially improves the mechanical performance, and this characteristic inhibits the formation of lithium dendrites in the deep stripping and deposition process of lithium.

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