Safety issues related to flammable electrolytes in lithium-ion batteries (LIBs) remain a major challenge for their extended application. The use of non-flammable phosphate−based electrolytes has proven its validity in inhibiting the combustion of LIBs. However, the strong interaction between Li+ and phosphate leads to a dominant solid electrolyte interphase (SEI) with limited electronic shielding, resulting in poor Li+ intercalation at the graphite (Gr) anode when using high−phosphate−content electrolytes.