Solubility of solid electrolyte interphase and electrolyte improvement strategies for sodium-ion batteries

AI Guanjie; ZHANG Jiao; XIE Fei; LU Yaxiang; ZHAO Jingwei; LIU Du; QIN Xiaokang; CHEN Liquan; HU Yongsheng

doi:10.19799/j.cnki.2095-4239.2026.0004

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Solubility of solid electrolyte interphase and electrolyte improvement strategies for sodium-ion batteries

Energy Storage Materials and Devices | 更新时间：2026-07-13

- Solubility of solid electrolyte interphase and electrolyte improvement strategies for sodium-ion batteries
- Energy Storage Science and Technology Vol. 15, Issue 6, Pages: 2089-2103(2026)
- 作者机构：
  
  1.中国科学院物理研究所，北京 100190
  2.中国科学院大学，北京 100049
  3.九江天赐高新材料有限公司，江西九江 332500
  4.中国科学院物理研究所怀柔研究部，北京 101408
- 作者简介：
- 基金信息：
- DOI：10.19799/j.cnki.2095-4239.2026.0004
  CLC： O 63
- Received：31 December 2025，
  
  Revised：2026-02-02，
  
  Published：28 June 2026
- 稿件说明：
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艾关杰, 张姣, 谢飞, 等. 钠离子电池固体电解质界相的溶解性及电解液改善策略[J]. 储能科学与技术, 2026, 15(6): 2089-2103.

AI Guanjie, ZHANG Jiao, XIE Fei, et al. Solubility of solid electrolyte interphase and electrolyte improvement strategies for sodium-ion batteries[J]. Energy Storage Science and Technology, 2026, 15(6): 2089-2103.
艾关杰, 张姣, 谢飞, 等. 钠离子电池固体电解质界相的溶解性及电解液改善策略[J]. 储能科学与技术, 2026, 15(6): 2089-2103. DOI： 10.19799/j.cnki.2095-4239.2026.0004.

AI Guanjie, ZHANG Jiao, XIE Fei, et al. Solubility of solid electrolyte interphase and electrolyte improvement strategies for sodium-ion batteries[J]. Energy Storage Science and Technology, 2026, 15(6): 2089-2103. DOI： 10.19799/j.cnki.2095-4239.2026.0004.

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。

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.

关键词

Keywords

references

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