fig4

Figure 4. (A) Long-term cycling performance of Si/C, Si/CNFs, and Si/CNFs/C anodes at 1,000 mA g^-1; (B) Comparative analysis of cycling performance with previously reported studies. (C and D) CV curves of the Si/CNFs/C anode recorded after 20 and 200 cycles, respectively; (E-H) DRT curves and corresponding transformations of in-situ EIS spectra for the Si/CNFs/C anode in its fresh state and after 200 cycles of operation. CNFs: Carbon nanofibers; CV: cyclic voltammetry; DRT: distribution of relaxation times; EIS: electrochemical impedance spectroscopy.