fig5

Figure 5. Influence of phosphorus-containing additives: (A) flammability and ionic conductivity of 1M NaPF₆ + EC/DEC (1/1) electrolyte with different amounts of EFPN additive; (B) the 1st_, 2nd, and 200th cycles of AB/Na half-cell with 1M NaPF₆ + EC/DEC (1/1) + 5% vol. EFPN electrolyte; Reproduced from ref^[61], Copyright 2015 RSC; (C) The cycling performances of Na₃V₂(PO₄)₂F₃/C cells with various electrolytes at 55 °C; (D) the percentage of capacity retention and recovery after the self-discharge measurements of Na₃V₂(PO₄)₂F₃/C cells at 100% state of charge for one week. Reproduced from ref^[68], Copyright 2019 IOP Publishing Limited. DEC: Diethyl carbonate; DMC: dimethyl carbonate; EC: ethylene carbonate; EFPN: ethoxy(pentafluoro)cyclotriphosphazene; NaODFB: sodium (oxalate) difluoro borate; SET: self-extinguishing time; TMSPi: tris(trimethylsilyl) phosphite; VC: vinylene carbonate.