Lithium Powder for Lithium Secondary Batteries Coated with Lithium Chloride and Method for Coating Lithium Chloride

Lithium Powder Anode with Dendrite Suppression via Lithium Chloride-Metal Alloy Composite Layer

This technology forms a composite layer of lithium chloride (LiCl) and metal (In, Al, Bi, As) alloys on the surface of a lithium metal anode to suppress dendrite growth and improve the interfacial resistance of the lithium powder anode.

Existing issues included low energy density when using lithium foil, the formation of dead lithium due to lithium dendrite growth during charge/discharge cycles, electrolyte depletion from side reactions, and reduced battery stability.

This technology utilizes naphthalene to remove the oxide film from the lithium powder surface, followed by a reaction with a metal chloride (e.g., InCl3) solution to form a 40–200 nm thick LiCl and lithium-metal alloy composite coating. This method can be used to increase the added value of secondary battery anode material applications.

‍

‍

Key Features:

• Manufacturing method comprising the steps of providing lithium powder and forming a lithium chloride coating layer on the surface of the lithium powder
• Configuration using naphthalene to remove the oxide film from the lithium powder surface during the lithium powder provision step
• Configuration forming a composite layer of lithium chloride and an indium, aluminum, bismuth, or arsenic alloy on the surface of the lithium metal anode
• Configuration suppressing dendrite growth and improving the interfacial resistance of the lithium powder anode using a lithium chloride-metal alloy composite layer

‍