Fig. 5: Electrochemical behavior of different electrolytes in Na | |NFM cells. | Nature Communications

Fig. 5: Electrochemical behavior of different electrolytes in Na | |NFM cells.

From: Directing selective solvent presentations at electrochemical interfaces to enable initially anode-free sodium metal batteries

Fig. 5

a LSV curves measured using Al working electrodes to evaluate the electrochemical oxidation stability of different electrolytes. b The leakage current of Na | |Al cells with various electrolytes. c Voltage profiles of Na | |NFM cells during 1st cycle. d Long-term cycling performance and voltage profiles of Na | |NFM cells in various electrolytes, including e 1.8 M NaPF6 in THF, f 1 M NaPF6 in 2-MeTHF and g 1.8 M NaPF6 in THF/2-MeTHF. h C 1 s, i F 1 s and j P 2p XPS spectra of positive electrodes. The NFM electrodes in XPS analysis were harvested from Na | |NFM half cells after 10 cycles at 0.2 C-rate (1 C = 120 mA/g) at 22 ± 1°C.

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