Lithium bisoxalatodifluorophosphate is primarily used as an electrolyte additive in lithium-ion batteries. It enhances the stability and performance of the battery by improving the solid electrolyte interface (SEI) layer on the anode. This leads to better cycling performance, increased thermal stability, and reduced capacity fading over time. Additionally, it helps in minimizing the decomposition of the electrolyte at high voltages, making it suitable for high-energy-density applications. Its use is particularly beneficial in extending the lifespan and safety of lithium-ion batteries in electric vehicles, portable electronics, and energy storage systems.