Fig. 4: Evolution of the NaCl crystal on the cathode tuned by iodine.
From: Iodine-induced self-depassivation strategy to improve reversible kinetics in Na-Cl2 battery
a Schematic of the molecular interaction of the original SOCl2 electrolyte and SOCl2 with iodine additive. b Comparison of the solvated complexes’ calculated LUMO energy levels in the SOCl2 electrolytes with and without iodine additive. c De-coordination energy of different Na+ coordination structure. d In-situ XRD spectra of rGO cathode in OC battery and SDC battery. e Ex-situ TEM image and f schematic of NaCl crystals of the OC after cycling, the inset image is the selected area electron diffraction (SAED) of NaCl crystals. The light blue balls represent sodium ions, the soft green color represents chloride ions, and the purple color represents iodide ions. g Ex-situ TEM image and h schematic of co-deposited crystals of NaCl and NaI after cycled. i XRD pattern of NaCl and NaI co-deposition. j k High-angle annualar dark field scanning transmission electron microscopy (HADDF-STEM) image and EDS mapping of Cl, Na, I and S on the SDC. l High-resolution I 3d XPS spectra change of SDC upon discharge/charge.
