Constructing Dissolution-Resistant Interphases for Long-Life Sodium-Ion Batteries at Elevated Temperatures.

ABSTRACT: Rechargeable sodium-ion batteries (SIBs) utilizing NaPF₆-carbonate electrolytes consistently exhibit unsatisfactory cycle life at elevated temperatures, posing a significant challenge for their large-scale commercialization. This is mainly caused by the instability of interphase layers at elevated temperatures, especially the high solubility of interphase components (especially NaF) in carbonate solvents. In this study, a novel additive of sodium difluorobis(oxalato) phosphate (NaDFBOP) is synthesized and introduced into NaPF₆-carbonate electrolytes to enhance the cycle life of commercial SIBs composed of NaNi_1/3Fe_1/3Mn_1/3O₂ (NFM) cathode and hard carbon (HC) anode, particularly at 50 °C. Specifically, the NaDFBOP enables NF

SUBMITTER: Deng W 

PROVIDER: S-EPMC12279246 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature