Fig. 2: Physicochemical properties and Raman spectra of three electrolytes.
From: Manipulating anion intercalation enables a high-voltage aqueous dual ion battery
a The hydration energy comparison of BF4−, Otf−, and TFSI−; (b) Diagrams of BF4−, (c) Otf−, and (d) TFSI− anions, respectively, with length and width noted; (e) LSV curves of three electrolytes; (f) The EIS spectrum tested by a coin cell with Cu and SS foil as anode and cathode, respectively. The inset shows amplification of low-frequency areas; (g) The comparison of calculated ionic conductivity of three electrolytes; (h) Raman spectra of NaBF4, (i) NaOtf, and (j) NaTFSI electrolytes, respectively.
