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From: In-situ construction of artificial interface layer using sodiophilic Bi₂S₃ nanowires for dendritic-free sodium-metal batteries

<i>In-situ</i> construction of artificial interface layer using sodiophilic Bi<sub>2</sub>S<sub>3</sub> nanowires for dendritic-free sodium-metal batteries

Figure 1. (A) SEM image, (B) TEM image with SAED pattern, and (C) HRTEM image of Bi₂S₃ nanowires; (D) HAADF-STEM image and (E and F) corresponding EDS maps of (E) Bi and (F) S elements for a bundle of Bi₂S₃ nanowires; (G) XRD pattern with inset showing the supercell structure of Bi₂S_3¬ (Yellow balls stand for Bi atomic sites, and green balls for S atoms); (H) Survey XPS spectrum, and (I) Bi 4f/S 2p XPS spectra of Bi₂S₃ nanowires. SEM: Scanning electron microscope; TEM: transmission electron microscope; XPS: X-ray photoelectron spectroscopy; XRD: X-ray diffraction; HRTEM: high-resolution transmission electron microscopy; HAADF-STEM: high-resolution transmission electron microscopy; SAED: selected area electron diffraction.