fig5

Figure 5. Nyquist plots of NCM90||Li cells at various cycles at room temperature: (A) STD; (B) 0.2% PFP-containing electrolyte. (C, D) Corresponding fitted results of Rsf and Rct for NCM90||Li cells. Relationship between Zre and ω-1/2 at low-frequency region for cells with (E) STD and (F) 0.2% PFP-containing electrolyte. STD: Standard electrolyte; PFP: pentafluoropyridine.