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Polymer coatings on lithium metal anodes

A major challenge in the development of solid-state batteries is the stabilization of the interface between the lithium metal anode and the solid electrolyte. This solid-solid interface is a challenge to maintain during cycling if only inorganic materials are used. While sulfide-based solid electrolytes have the highest ionic conductivities, they suffer from poor electrochemical stability in contact with lithium metal, leading to solid electrolyte interphase formation. Dendrite formation during lithium plating and pore formation during stripping are two further failure mechanisms. To mitigate these issues, a protective polymer coating is developed for the lithium metal anode, which may prevent dendrites and promote homogenous lithium plating.