Fabricating an artificial solid electrolyte interface (SEI) is a promising approach to improve cycling stability of lithium metal batteries. In this work, a new category of artificial SEI based on oxygen vacancy-rich hybrid nanoparticles was prepared by covalently grafting polymers from yttria–stabilized zirconia (YSZ) nanoparticles via surface-initiated atom transfer radical polymerization (SI-ATRP). The hairy nanoparticles had high dispersibility in dimethylsulfoxide, and were solution casted into uniform thin films with high inorganic content, high ionic conductivity (>1 × 10⁻⁴ S/cm at r.t.), and good mechanical properties (Young's modulus 7.56 GPa). No dendrite formation was observed by in-situ optical microscopy on a lithium metal protected by such artificial SEI. Protected anodes were stably cycled at 3 mA/cm² and 3 mA h/cm² with low overpotentials (20 mV) for >2500 h. LiNi_0.8Co_0.15Al_0.05O₂ (NCA)|Li full cells with protected Li anode showed much higher specific discharge capacity at various rates and improved capacity retention compared to unprotected Li anode.

制造人造固体电解质界面（SEI）是提高锂金属电池循环稳定性的一种有前途的方法。在这项工作中，通过表面引发的原子转移自由基聚合（SI-ATRP）将氧化钇稳定的氧化锆（YSZ）纳米粒子中的聚合物共价接枝，从而制备了一种基于富氧空位杂化纳米粒子的新型人造SEI。毛状纳米颗粒在二甲亚砜中具有高分散性，并被溶液流延成具有高无机含量，高离子电导率（ 室温下> 1×10 ^-4 S / cm）和良好的机械性能（杨氏模量7.56 GPa）的均匀薄膜。原位未观察到枝晶形成用这种人工SEI保护的锂金属上的光学显微镜。将受保护的阳极以3 mA / cm ²和3 mA h / cm ²的低过电势（20 mV）稳定循环> 2500 h。与未保护的Li阳极相比，具有受保护的Li阳极的LiNi _0.8 Co _0.15 Al _0.05 O ₂（NCA）| Li满电池在各种速率下均显示出更高的比放电容量，并改善了容量保持率。