Composition for lithium metal anode protective coating and lithium metal battery using the same

Lithium metal anode protective coating composition containing additives encapsulated in block copolymer micelles

This technology utilizes the micelle structure of block copolymers to electrostatically bind and encapsulate lithium battery additives (metal salts) within the core (e.g., P2VP). This ensures uniform distribution of the additives even in carbonate-based electrolytes and promotes the formation of an ion-conductive Li3N-based SEI layer on the lithium metal surface, effectively suppressing dendrite growth.

The high reactivity of lithium metal anodes leads to dendrite formation, while the low solubility and uneven distribution of SEI-forming additives in carbonate-based electrolytes have historically limited battery lifespan and stability.

By utilizing a composition containing block copolymers such as polystyrene-b-poly(2-vinylpyridine), an organic solvent, and metal salts that enhance lithium-ion conductivity (e.g., LiNO3, AgNO3, HAuCl4), this technology can be effectively used to improve the efficiency of manufacturing processes for secondary battery anode materials.

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Key Features:

• Composition for a lithium metal protective coating comprising a block copolymer containing a first polymer and a second polymer, an organic solvent, and a metal salt
• Block copolymer forming a micelle structure in an organic solvent where the second polymer faces inward and the first polymer faces outward
• Metal salt encapsulated within the micelle core through the bonding of metal to the nitrogen atom of the second polymer's heterocyclic ring
• Configuration that ensures uniform distribution of additives within carbonate-based electrolytes via the micelle structure

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