fig7
Figure 7. (A) Cyclic voltammetry curves of CeO2@void@C electrode under different scan rates. (B) Fitting of the square root of the peak current and the scan rate (v1/2). (C) Capacitive contribution of CeO2@void@C to the total storage. (D) Contribution ratios of the capacitive and diffusion-controlled process under various scan rates.
