Figure 1: Synthesis and characterization of Li2S@TiS2 core–shell nanostructures. | Nature Communications

Figure 1: Synthesis and characterization of Li2S@TiS2 core–shell nanostructures.

From: Two-dimensional layered transition metal disulphides for effective encapsulation of high-capacity lithium sulphide cathodes

Figure 1

(a) Schematic of the synthesis process, (b) SEM image and (c) TEM image of Li2S@TiS2 structures. Scale bars, 5 μm (b) and 500 nm (c). (d) High-resolution TEM image of the TiS2 shell, showing the interlayer spacing of 0.57 nm. Scale bar, 5 nm. (e) XRD spectrum of Li2S@TiS2 structures (JCPDS files 00-026-1188 and 04-004-6690 were used as references for Li2S and TiS2, respectively). (f) Raman spectra of bare Li2S and Li2S@TiS2 structures. (g) Ab initio simulations showing the most stable binding configuration of Li2S with a single layer of TiS2, with a calculated binding energy of 2.99 eV. RT, room temperature.

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