Fig. 5. Electrochemical performances of the spiral MCNs as anodes for KIBs.

(A) CV curves at a scan rate of 0.1 mV s⁻¹, (B) charge/discharge curves at a current density of 0.1 A g⁻¹, (C) reversible capacity tests at a current density of 0.1 A g⁻¹, (D and E) rate capability tests from 0.2 to 5.0 A g⁻¹, and (F) cycling stability at 2.0 A g⁻¹ for 500 cycles.