fig5

Figure 5. Electrochemical sodium-storage performance: (A) galvanostatic charge/discharge profiles, (B) CV curves of SGHC-8 and SHC, (C) CV curves of OHC, (D) rate performance, (E) cycling performance at 0.02 A g^-1, and (F) EIS spectra. EIS: Electrochemical impedance spectroscopy; CV: cyclic voltammetry; OHC: oxidized coal-derived hard carbon; SHC: chitosan-loaded oxidized coal-derived hard carbon.