Applications and Challenges of 2D Materials in Lithium Metal Batteries

Owing to the high theoretical specific capacity and low electrochemical potential, lithium (Li) metal is considered as the most promising anode material for next-generation batteries. However, the commercial application of lithium metal batteries (LMBs) is restricted by Li dendritic growth and infinite volume change. Generally, introducing lithiophilic sites and constructing artificial solid-electrolyte interphase (SEI) layer are regarded as effective ways to induce uniform deposition of Li and inhibit growth of Li dendrites. 2D materials, due to their unique planar structure, high specific surface area, high mechanical strength and rich surface chemistry, are expected to achieve high performance LMBs with high stability and safety. Herein, the current progress of 2D materials for LMBs is summarized, focusing on constructing lithiophilic sites and artificial solid-electrolyte interphase (SEI) layer. Perspectives of future directions for LMBs are discussed. With the continuous research of 2D materials in LMBs, it is predictable that 2D materials will have great application prospects and make a difference in high-energy-density LMBs.