Dendrite growth and continuous electrolyte decomposition are critical issues for lithium metal batteries. These issues arise from the high reactivity of lithium in organic electrolytes, the spontaneous formation of solid electrolyte interphase layer on the anode surface occurs. If an ununiform SEI layer forms, it leads to uneven resistance across the anode. Lithium tends to deposit preferentially in areas with lower resistance, resulting in the formation of dendrites. To address these problems, we focus on the fabrication of an artificial SEI layer based on polymers. The desired properties of the polymer coating layer include high ionic conductivity, mechanical robustness, and low electronic conductivity. These polymers are designed to include lithiophilic and polar functional groups, as well as aromatic units to enhance mechanical strength. By using an artificial SEI to ensure uniform resistance and incorporating lithiophilic functional groups, dendrite nucleation can be suppressed.