Rechargeable sodium batteries have become an important complement to lithium secondary batteries and other energy devices due to their lithium-like operating mechanism and abundant sodium resources. Sodium metal batteries (SMBs) with high energy density can be applied in more aspects, but still faces more prominent challenges such as sodium dendrite growth and severe electrode-electrolyte interface reactions. Fluoroethylene carbonate (FEC) additive can effectively improve the stability of sodium metal anode due to the formation of a stable solid electrolyte interfacial (SEI) layer on sodium surface. However, the protective effect is not sufficient in suppressing sodium dendrite and corrosion of electrolyte as its easily ring-opening polymerization induced by Lewis acid (especially PF₅) in carbonate electrolytes. Here, 3-Trimethylsilyl-2-oxazolidinone (TMSO) as a multifunctional additive that not only removes H₂O and HF from the electrolyte, but also inhibits the decomposition of NaPF₆ and improves the stability of FEC-containing electrolytes. Besides, TMSO can form a stable cathode electrolyte interfacial (CEI) layer on Na₃V₂(PO₄)₃ (NVP) cathode surface, alleviating NVP cracking and structural pulverization and thus endowing the long-term cycling stability of NVP cathode with low interfacial resistance. Notably, with the optimized electrolyte, the Na||NVP metal battery exhibits stable cycle performance with a capacity retention of 93.1% after 1400 cycles at room temperature and higher capacity retention of 96.6% for 270 cycles at 55 °C.

可充电钠电池由于其类似锂的运行机制和丰富的钠资源，已成为锂二次电池等能源设备的重要补充。高能量密度的钠金属电池（SMBs）可以应用于更多方面，但仍面临钠枝晶生长和严重的电极-电解质界面反应等更突出的挑战。由于在钠表面形成了稳定的固体电解质界面（SEI）层，氟代碳酸亚乙酯（FEC）添加剂可以有效提高钠金属负极的稳定性。然而，由于其易被路易斯酸（尤其是PF ₅) 在碳酸盐电解质中。在这里，3-Trimethylsilyl-2-oxazolidinone (TMSO) 作为一种多功能添加剂，不仅可以去除电解液中的 H ₂ O 和 HF，还可以抑制 NaPF ₆的分解并提高含 FEC 电解液的稳定性。_{此外，TMSO可以在Na 3} V ₂ (PO ₄ ) ₃上形成稳定的阴极电解质界面(CEI)层。(NVP)正极表面，减轻NVP开裂和结构粉化，从而赋予NVP正极长期循环稳定性低的界面电阻。值得注意的是，采用优化的电解质后，Na||NVP 金属电池表现出稳定的循环性能，在室温下循环 1400 次后容量保持率为 93.1%，在 55℃下循环 270 次后容量保持率更高，达到 96.6%。