fig5

Figure 5. Charge storage kinetics. CV curves of the (A) meso-Nb₂O₅-500, (B) meso-Nb₂O₅-700, and (C) NP-40 nm electrodes at sweep rates varied from 0.2 to 1.0 mV·s^-1; The fitted b-values of (D) anodic and cathodic peaks, along with the (E) simulated contributions from capacitance and diffusion at 0.2 mV·s^-1 for the three electrodes; (F) GITT curves and $$ D_{\mathrm{Li}^+} $$vs. Li_xNb₂O₅ plots of the 2nd discharge for the three electrodes. CV: Cyclic voltammetry; GITT: galvanostatic intermittent titration technique.