Lithium metal batteries have obtained increasing interest due to their high specific capacity. Nonetheless, the growth of lithium dendrites brings safety risks to batteries and further deteriorates the performance. Herein, we explore diethyl phenylphosphonite (DEPP) as the electrolyte additive to alleviate this problem. DEPP can be preferentially decomposed than carbonate solvents to form the stable interface between electrolyte and lithium anode for inhibiting the dendrite growth. As expected, the symmetrical LiIILi cells could achieve a stable cycling performance with 200 h at 1 mA cm^-2. Moreover, DEPP can be preferentially oxidized on the surface of lithium cobalt oxides (LiCoO₂) to form a dense cathode electrolyte interphase (CEI) film for suppressing the continuous oxidative decomposition of the electrolyte and eliminating the adverse effects of HF on the battery. This endows LiCoO₂IILi full battery with the enhanced cycling and rate performance.

锂金属电池由于其高比容量而受到越来越多的关注。尽管如此，锂枝晶的增长给电池带来了安全风险，并进一步降低了性能。在这里，我们探索了二乙基苯基亚膦酸酯（DEPP）作为电解质添加剂来缓解这个问题。DEPP比碳酸盐溶剂更容易分解，在电解质和锂负极之间形成稳定的界面，抑制枝晶生长。正如预期的那样，对称的 LiIIIi 电池可以在 1 mA cm ^{-2 下}实现 200 小时的稳定循环性能。此外，DEPP 可以在钴酸锂 (LiCoO ₂) 形成致密的阴极电解质中间相 (CEI) 膜，以抑制电解质的持续氧化分解并消除 HF 对电池的不利影响。这使 LiCoO ₂ IILi 全电池具有增强的循环和倍率性能。