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.

Recent Advances in Cu-Based Metal–Organic Frameworks and Their Derivatives for Battery Applications

“…Due to the decrease in current density, the copper oxide nanorod array promotes a Yin and his team used a convenient and versatile immersion strategy to build a multifunctional current collector through the in situ growth of a conductive Cu-MOF thin layer (Cu-MOFTL) on copper foil. 186 The copper foil electrode improved by the Cu-MOF layer was stable up to 300 cycles and achieved an excellent CE of over 97.1%. With Li@Cu-MOF-30min as the anode, the full battery reached a capacity of 119.8 mA h g −1 after 100 cycles at 0.5 C, where the CE was 99.7%.…”

“…Yin and his team used a convenient and versatile immersion strategy to build a multifunctional current collector through the in situ growth of a conductive Cu-MOF thin layer (Cu-MOFTL) on copper foil . The copper foil electrode improved by the Cu-MOF layer was stable up to 300 cycles and achieved an excellent CE of over 97.1%.…”

Present and future of functionalized Cu current collectors for stabilizing lithium metal anodes

“…The rich lithiophilic functional groups remarkably enhance the absorption of Li ions, resulting in even Li deposition and dissolution processes. Yin et al prepared a thin-layer Cu-based MOFs on Cu foil by the coordination between Cu metal nodes and 7,7,8,8-tetracyanoquinodimethane (TCNQ) [83]. As shown in Fig.…”

A 3D lithiophilic ZIF-8@RGO free-standing scaffold with dendrite-free behavior enabling high-performance Li metal batteries

“…In this regard, colossal efforts have been focused on tackling these crucial issues from different perspectives, such as optimizing electrolyte compositions, [12][13][14][15] constructing articial interfacial layers, [16][17][18][19][20] and developing solid-state electrolytes. [21][22][23][24] Despite the progress in these strategies, an emphasis on suppressing dendrite growth and repeated volume changes is still not simultaneously achieved for the high utilization (>∼90%) of Li metal to meet the target of ∼500 W h kg −1 energy density, particularly at high rates.…”