A robust and conductive LiF-rich solid electrolyte interface layer was generated at the phosphorus surface through salt-additive chemistry, and it then served as a high-performance fast-charging lithium ion battery anode, delivering a high reversible capacity of 450 mA h g⁻¹ after 450 cycles with a high charging current density of 8 A g⁻¹ (about 3 min).