fig6
From: Fe single-atom-regulated carbon nanofibers for high-performance lithium/sodium ion battery anode
Figure 6. Various perspectives of a single Li atom adsorbed on N-C (A1) and Fe-N-C-2 (B1); (A2 and B2) The associated differences in charge density. The regions of charge gain and loss are depicted in yellow and cyan. (N, C, Li, and Fe atoms are depicted as blue, gray, pink, and purple balls); (C) Energy barrier, pathway of N-C and Fe-N-C-2. (G) The calculated density of states of (D) N-C and
