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.
Bibliographical noteKAUST Repository Item: Exported on 2020-12-22
Acknowledgements: This work is supported by the National Key R&D Program of China (Grant No. 2017YFE0198100), the National Natural Science Foundation of China (Grant No. 21975250), the Major Projects of Baotou Rare Earth Research and Development Center, Chinese Academy of Sciences (Grant No. ZK2017H1970), and the Scientific and Technological Developing Project of Jilin Province (Grant No. 20180201098GX). L.W. Y.C. and G.H. designed the research idea and experiments. D.Y. Z.W. and Q.L. together completed related experiments, and H.X. was responsible for the SEM characterization. D.Y. and G.H. wrote the paper. The authors declare no competing interests.