A BF -Doped MXene Dual-Layer Interphase for a Reliable Lithium-Metal Anode.

A dual-layer interphase that consists of an in-situ-formed lithium carboxylate organic layer and a thin BF -doped monolayer Ti C MXene on Li metal is reported. The honeycomb-structured organic layer increases the wetting of electrolyte, leading to a thin solid electrolyte interface (SEI). While the BF -doped monolayer MXene provides abundant active sites for lithium homogeneous nucleation and growth, resulting in about 50% reduced thickness of inorganic-rich components among the SEI layer.