Fig. 4: Characterization of the G/SEI/SPE interface after Li stripping.
From: In situ infrared nanospectroscopy of the local processes at the Li/polymer electrolyte interface
a Optical, atomic force microscopy (AFM), and infrared (IR) white light images of the G/SEI/SPE interface. b Average nano-FTIR spectra of the interface after heating to 45 °C and after Li stripping from the two SEI regions indicated by the colored locations in a. c ATR-FTIR spectra of the interface after heating to 45 °C and after Li stripping. d Individual nano-FTIR spectra of the G/SEI/SPE interface after Li stripping. Spectra are numbered and color-coded according to the locations in a. e Venn diagram depicting key similarities and differences between the two predominate SEI regions.
