Fig. 4: Interfacial stability enabled by dense SEI. | Nature Communications

Fig. 4: Interfacial stability enabled by dense SEI.

From: Dipole-dipole interaction-induced dense primitive solid-electrolyte interphase for high-power Ah-level anode-free sodium metal batteries

Fig. 4

Water corrosion test of surface-passivated sodium metal in (a) water-containing ethanol solution and (b) water-containing solvents. c Voltage profiles and DEMS signals for m/z = 2 (H2) emission of Na symmetric cells, using NG2 and NGMPE electrolytes, at a current density of 5 mA cm−2 and areal capacity of 2.5 mAh cm−2. d In situ observation of Na deposition and surface morphology evolution by optical microscopy at ca urrent density of 3 mA cm−2. AFM height images of SEI formed in (e) G2 electrolytes and (f) NGMPE electrolyte at 5 mA cm−2 and 5 mAh cm−2 after 10 cycles, with the average surface roughness and Young’s modulus indicated. g Tafel curves for Na plating/stripping in the electrolyte of NG2 and NGMPE.

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