Citation: Yan Meng, Yuanheng Wang, Qingjiang Liu, Xingyu Chen, Hongji Pan, Jinghao Zhao, Lin Han, Xin Li, Jia-Yan Liang. Construction of stabilizing solid electrolyte interphase with rapid Na⁺ transport kinetics via flame retardant for safe and high-performance sodium-ion batteries[J]. Chinese Chemical Letters, ;2026, 37(5): 112348. doi: 10.1016/j.cclet.2025.112348 shu

Construction of stabilizing solid electrolyte interphase with rapid Na⁺ transport kinetics via flame retardant for safe and high-performance sodium-ion batteries

State Key Laboratory of Space Power-Sources, MOE Engineering Research Center for Electrochemical Energy Storage and Carbon Neutrality in Cold Regions, School of Chemistry and Chemical Engineering, Harbin Institute of Technology (HIT), Harbin 150001, China

lixin@hit.edu.cn

liangjiayan@hit.edu.cn

Received Date: 25 November 2025
Revised Date: 29 December 2025
Accepted Date: 30 December 2025
Available Online: 30 December 2025

Figures(4)

The unstable solid electrolyte interphase (SEI) characterized by sluggish ion transport kinetics and consecutive side reactions poses a major challenge to the commercialization of sodium-ion batteries (SIBs). Here, ethoxy (pentafluoro) cyclotriphosphazene (PFPN) as a multifunctional electrolyte additive is reported to construct stable and highly ion-conductive SEI. PFPN decomposes preferentially to form the NaF, Na₃N-rich SEI with fast Na⁺ migration kinetics due to its low lowest unoccupied molecular orbital energy and strong adsorption on hard carbon (HC) anode. Meanwhile, the incorporation of PFPN effectively suppresses exothermic reactions at the electrode/electrolyte interface, thereby reducing the risk of thermal runaway. As expected, the HCNa cell with PFPN additive demonstrates homogeneous sodium deposition on HC anode and delivers a high reversible capacity of 248.5 mAh/g with negligible capacity decay after 1000 cycles at 0.1 A/g. The NaNi_0.33Fe_0.33Mn_0.33O₂ (NFM)HC full cell also yields enhanced cycling stability under -20 ℃. This study proposes a simple and effective SEI regulation strategy for high-performance and safe SIBs.
- Sodium-ion battery,
- Flame-retardant additive,
- Solid electrolyte interface,
- Rapid Na⁺ transport,
- Thermal runaway
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沈阳化工大学材料科学与工程学院沈阳 110142

Construction of stabilizing solid electrolyte interphase with rapid Na+ transport kinetics via flame retardant for safe and high-performance sodium-ion batteries

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通讯作者: 陈斌, bchen63@163.com

Construction of stabilizing solid electrolyte interphase with rapid Na⁺ transport kinetics via flame retardant for safe and high-performance sodium-ion batteries