Stable Lithium Metal Anode with Metal Copper Mesh

Stable Lithium Metal Anode with Metal Copper Mesh

Introduction

With the continuous advancements in materials technology and characterization methods, lithium metal batteries (LMBs) have gained significant attention due to their high theoretical gravimetric capacity and low reduction potential. However, one major challenge hindering their widespread adoption is the formation of lithium dendrites during cycling, posing safety risks and leading to low Coulombic efficiency and capacity fading.

In addressing this issue, the utilization of copper mesh decorated with a cost-effective tin (Sn) layer emerges as a promising solution for a stable lithium metal anode. The copper mesh, modified with a lithiophilic Sn layer, demonstrates a reduced lithium nucleation overpotential, comparable to precious metals like gold (Au) and silver (Ag). This modification enhances the lithiophilicity of the substrate, promoting uniform lithium distribution and suppressing dendrite formation during the initial lithium plating process.

The incorporation of the Sn layer on the copper mesh creates a lithiophilic environment, facilitating the nucleation of lithium and forming a stable Li–Sn alloy during repeated plating and stripping cycles. As a result, the copper mesh decorated with Sn exhibits high Coulombic efficiency and superior cycling stability, offering a dendrite-free lithium deposition. This innovative approach provides a cost-effective alternative to expensive metals like Au and Ag, making it a potential candidate for large-scale applications in the lithium battery industry.

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