Lithium metal is considered one of the most promising anode materials because of its high theoretical capacity and the lowest electrode potential, but practical application is hampered by high reactivity and volume variation in circulation. As a key component, the artificial solid electrolyte interphase (SEI) is designed to effectively stabilize the lithium anode. Here, the chemical reaction between dimethyl sulfoxide (DMSO) and lithium is accelerated in the presence of potassium hydroxide (KOH). The sulfur-containing organic compounds, lithium sulfate (Li₂SO₄), lithium hydroxide (LiOH) and other favorable components are introduced into SEI, which enable the modified lithium metal anode to have lower interfacial impedance, higher lithium ion transference number, and more uniform Li-ion deposition. The assembled Li-Li symmetric battery realizes a stable cycle of more than 800 h at a current density of 0.5 mA cm⁻¹ and an areal capacity density of 1 mAh cm⁻¹. The full cell coupled with LiNi_0.6Co_0.2Mn_0.2O₂ (NCM622) still maintains 113 mAh g⁻¹ discharge capacity with 63% capacity retention rate after 400 cycles at a current density of 0.5 C. The simple construction of artificial SEI strategy of this study provides an effective strategy for LMBs with superior electrochemical performance.

锂金属因其高理论容量和最低电极电位而被认为是最有前途的负极材料之一，但实际应用受到高反应性和循环体积变化的阻碍。作为关键组件，人工固体电解质界面（SEI）旨在有效稳定锂负极。在这里，二甲基亚砜 (DMSO) 和锂之间的化学反应在氢氧化钾 (KOH) 的存在下加速。含硫有机化合物，硫酸锂（Li ₂ SO ₄)、氢氧化锂(LiOH)等有利成​​分被引入SEI中，使改性锂金属负极具有更低的界面阻抗、更高的锂离子迁移数和更均匀的锂离子沉积。^{组装的Li-Li对称电池在0.5 mA cm -1的电流密度和1 mAh cm -1}的面积容量密度下实现了超过800小时的稳定循环。_{与LiNi 0.6} Co _0.2 Mn _0.2 O ₂ (NCM622)耦合的全电池仍保持113 mAh g ^-1在 0.5 C 的电流密度下循环 400 次后具有 63% 的容量保持率的放电容量。本研究的人工 SEI 策略的简单构建为具有优异电化学性能的 LMBs 提供了有效的策略。