【摘要】 固体电解质界相（SEI膜）的稳定性，尤其是其在电解液中的溶解性，是影响钠离子电池循环寿命与日历寿命的关键因素之一。大量文献报道表明，钠离子电池中的SEI膜（Na-SEI膜）和锂离子电池相比表现出更强的溶解倾向。本文系统梳理了Na-SEI膜溶解性的关键影响因素，深入剖析了其与锂电SEI膜（Li-SEI膜）在物理化学性质方面的差异，综述了溶解性的测试表征方法。并且全面归纳了通过电解液设计调控SEI膜溶解性的前沿策略，涵盖添加剂、弱溶剂化溶剂、新型/高浓度盐应用及多组分协同调控等方面。最后，基于当前研究基础，对未来研究方向进行了展望，旨在为构建高稳定钠离子电池界面研究提供技术路径和理论指导。更多还原

【Abstract】 The stability of the solid electrolyte interphase(SEI), particularly its solubility in electrolytes, is a critical determinant of the cycle and calendar life of sodium-ion batteries. Numerous studies have reported that the SEI in sodium-ion batteries(Na-SEI) is more prone to dissolution than its counterpart in lithium-ion batteries(Li-SEI). This study systematically summarizes the key factors governing the solubility of Na-SEI, provides a critical analysis of differences in physicochemical properties between Na-SEI and Li-SEI, and reviews the analytical techniques and characterization methods for evaluating SEI solubility. Crucially, we comprehensively consolidate state-of-the-art strategies for modulating SEI solubility through rational electrolyte design, including molecular engineering of electrolyte solvents, optimization of salt concentration, incorporation of novel or highly concentrated salts, and multicomponent synergistic approaches. Finally, based on the current state of research, we outline prospective research directions aimed at providing theoretical insights and practical pathways for achieving highly stable electrode-electrolyte interfaces in sodium-ion batteries.更多还原