fig2

Figure 2. XRD patterns of (A) C/CoFe-MXene, C/CoFe and MXene; (B) TGA curves of C/CoFe-MXene/S, C/CoFe/S and MXene/S; High-resolution (C) C 1s and (D) O 1s XPS spectra. XRD: X-ray diffraction; TGA: thermogravimetric analysis; XPS: X-ray photoelectron spectroscopy.