Fig. 4: Interfacial chemistry of graphite anodes retrieved from full cells cycled with different electrolytes.
From: Multifunctional solvent molecule design enables high-voltage Li-ion batteries
a XPS depth profiles of F 1s, S 2p, O 1s, and C 1s for graphite anodes retrieved from full cells cycled with the 1.9 M LiFSI/TTMS–TM electrolyte at a sputtering time of 0, 120, 300, and 600 s. b Relative content of the detected elements on the surface of graphite anodes retrieved from full cells cycled with indicated electrolytes. c, d Atomic concentration at different depths of SEI formed in 1.9 M LiFSI/TTMS–TM electrolyte (c) and 1 M LiPF6/EC–DMC + 2%VC electrolyte (d). e, f Cryo-TEM images of graphite anodes after 100 cycles in 1.9 M LiFSI/TTMS–TM electrolyte (e) and 1 M LiPF6/EC–DMC + 2%VC electrolyte (f). g, h Corresponding EELS mappings of graphite anodes retrieved from full cells cycled with the 1.9 M LiFSI/TTMS–TM electrolyte (g) and the 1 M LiPF6/EC–DMC + 2%VC electrolyte (h).
