fig4

Figure 4. (A) Crystal structure model of FeS; (B) Crystal structure model of ZnS; (C) Theoretical calculation model; (D) Partial density of states (PDOS) of ZnS/PCFs and FeS-ZnS/PCFs-20%; (E) CV curves of the FeS-ZnS/PCFs-20% anode at various scan rates; (F) Corresponding b value fitting using the relationship between peak current and scan rate; (G) CV curves with capacitive contribution at 1.0 mV s^-1; (H) Contribution ratio vs. scan rate; (I) Corresponding Li-ion diffusion coefficient of the ZnS/PCFs and FeS-ZnS/PCFs-20% anodes; (J) EIS spectra of the ZnS/PCFs and FeS-ZnS/PCFs-20% anode; (K) linear fitting of the Warburg impedance of the ZnS/PCFs and FeS-ZnS/PCFs-20% anode; (L) DRT of the ZnS/PCFs and FeS-ZnS/PCFs-20% anodes.