fig3

Figure 3. Chemical structure characterization of PPy-NaVO. (A) Full XRD patterns; (B) Enlarged view of the (001) diffraction peak; (C) FTIR spectra; (D-F) High-resolution XPS spectra; (G) Raman spectra; (H) Pore size distribution curves (inset) and N2 adsorption-desorption isotherm curves. XRD: X-ray diffraction; XPS: X-ray photoelectron spectroscopy; FTIR: Fourier transform infrared spectroscopy; PPy-NaVO: polypyrrole-pillared Na₂V₆O₁₆.