Metallic lithium (Li) is a promising anode for Li‐based batteries, owing to its high theoretical capacity and the low potential. However, the dendrites and high chemical activity of metallic Li limits its practical applications. To overcome these challenges, a fast‐ionic conductor, antimony‐doped lithium phosphate (Sb‐doped Li₃PO₄) artificial solid electrolyte interphase (SEI) layer, is directly coated on bare copper (Cu) foil by radio frequency (RF) magnetron sputtering, which can facilitate the uniform distribution of lithium ions, reduce the side reaction, and even inhibit the dendrite growth. As a result, the artificial Sb‐doped Li₃PO₄ SEI‐modified Cu electrode renders a good coulombic efficiency of 97 % for approximately 285 cycles at current density of 1 mA/cm² and over 700 h of stable cycles in a symmetric cell. The fabricated artificial SEI layers make the deposition of lithium occur more densely and the electrochemical impedance is smaller compared to the bare Cu electrode. This study will impact the general approach to realize and achieve next‐generation high‐energy‐density lithium‐metal batteries.

中文翻译：

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无树突状锂金属电池的锑掺杂磷酸锂人造固体电解质中间相

金属锂（​​Li）由于其高理论容量和低电势，是锂基电池的有希望的阳极。但是，金属锂的树枝状和高化学活性限制了其实际应用。为了克服这些挑战，将快速离子导体，掺锑的磷酸锂（Sb掺杂的Li ₃ PO ₄）人造固体电解质相（SEI）层直接通过射频（RF）涂覆在裸铜（Cu）箔上磁控溅射，可以促进锂离子的均匀分布，减少副反应，甚至抑制枝晶的生长。结果，人造Sb掺杂的Li ₃ PO ₄SEI改性的Cu电极在1 mA / cm ^2的电流密度下以及在对称电池中经过700 h的稳定循环后，在约285个循环中可实现97％的良好库仑效率。与裸露的Cu电极相比，人造SEI层使锂的沉积更加紧密，电化学阻抗更小。这项研究将影响实现和实现下一代高能量密度锂金属电池的一般方法。