(TEM) and X-ray diffraction (XRD) analysis as shown in Figures 2 and 3, and Figures S2 and S3 in Supporting Information. For example, Figure 2a shows the TEM image of as-prepared MoS2@ZIF-8 hybrid structures. The TEM image of a curled MoS2@ZIF-8 hybrid reveals its cross section, which shows the embedded MoS2 core and ZIF-8 shell (Figure 2b). The crystal structure of the coating was confirmed by XRD as ZIF-8 with cubic structure, space group I43m (Figure S2 in Supporting Information).28 No specific orientation was observed in the XRD pattern, indicating the polycrystalline nature of the coated ZIF-8 shell. Note that the characteristic XRD peak for MoS2(002) at ∼15 was not shown because the embedded MoS2 nanosheets are too thin (i.e., single to a few layers) to give detectable signal.27 The scanning transmission electron microscope (STEM) image and the corresponding energy dispersive X-ray spectrometry (EDS) elemental mapping of a typical