Stable Interface for Lithium Batteries via Stitching Two-Dimensional Atomic Crystals by Atomic Layer Deposition

Stanford researchers at the Yi Cui Lab have demonstrated a new method to increase stability of lithium battery interfaces via stitching of two-dimensional atomic crystals by atomic layer deposition (ALD) which provides an innovative way to prepare chemically and mechanically stable hybrid film. This hybrid LiF/h-BN film successfully suppresses lithium dendrite formation during both the initial electrochemical deposition onto a copper foil and the subsequent cycling. The protected lithium electrodes exhibit good cycling behavior with more than 300 cycles at relatively high coulombic efficiency (>95%) in an additive-free carbonate electrolyte.

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Figure description - SEM characterization
(A) Schematics of selective ALD LiF deposition on h-BN. (B) SEM characterization of 50 cycles of ALD LiF deposition on continuous h-BN. (C) SEM characterization of 50 cycles of ALD LiF deposition on the edge of h-BN.

Stage of Research