In Situ Growth of Lithiophilic MOF Layer Enabling Dendrite-free Lithium Deposition.

ABSTRACT: Lithium metal batteries have recently emerged as alternative energy storage systems beyond lithium-ion batteries. However, before this kind of batteries can become a viable technology, the critical issues of the Li anodes, like dendrites growth and low Coulombic efficiency (CE), need to be conquered. Herein, lithiophilic Cu-metal-organic framework thin layer (Cu-MOF TL) is in situ grown on the surface of Cu foil by a facile immersion strategy to construct a multifunctional current collector. Profiting from the high electrical conductivity and unique porous structure, the Cu-MOF TL with high affinity to electrolyte can provide uniform nucleation sites and promote homogeneous Li⁺ flux, as a result, radically restrain the Li dendrite growth, leading to stable Li plating/striping behaviors. The modified current collector enables Li plating/stripping with a prominent CE (?97.1%) and a stable lifetime (?2500 h). Importantly, the synthesis method can be easily large-scale production in a series of organic solvents.

SUBMITTER: Yin D 

PROVIDER: S-EPMC7733026 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature