fig3
From: Fe single-atom-regulated carbon nanofibers for high-performance lithium/sodium ion battery anode
Figure 3. (A) Fe K-edge XANES spectra; (B) k3-weighted χ(R) function of EXAFS spectra; and (C) EXAFS fitting curve of Fe-N-C-2; (D) WT patterns of Fe foil, FePc, Fe2O3 and Fe-N-C-2. XANES: X-ray absorption near edge structure; EXAFS: extended X-ray absorption fine structure; WT: wavelet transform.
