Enhanced high voltage performance of LiNi0.5Mn0.3Co0.2O2 cathode via the synergistic effect of LiPO2F2 and FEC in fluorinated electrolyte for lithium-ion batteries

LiNi_0.5Mn_0.3Co_0.2O₂ can achieve great electrochemical performances because of the robust and protective fluorinated organic–inorganic film on the cathode, which derives from the FEC cosolvent and LiPO₂F₂ additive.