Fig. 2: Electrolyte oxidation mechanism and spectroscopic insights. | Nature Communications

Fig. 2: Electrolyte oxidation mechanism and spectroscopic insights.

From: Anion-mediated approach to overcome oxidation in ether electrolytes for high-voltage sodium-ion batteries

Fig. 2

a Schematic representation of the cathode-driven electrolyte oxidation process in a charged state. The term LUMO refers to the lowest unoccupied molecular orbital. b Graphical depiction of the HOMO energy level and DN numbers for the G2 solvent molecule, OTf-, and NO3-. c Raman, (d) 23Na NMR, and (e) 1H NMR spectra of the G2 and R-G2 electrolytes. The insets in (c–e) display the solvation structure of CIP-OTf, CIP-NO3, and the molecular structure of the free G2 solvent, respectively. f Comparative electrostatic potential mapping and structural formulas of the predominant solvation structures. Structures dominated by NNO are highlighted within an orange dotted box.

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