fig4

Figure 4. The calculated $$ D_{L i^{+}} $$ for (A) TNO and N-C@TNO; (B) Nyquist plot. (C) Logarithmic relationships between the peak current and the scan rate; (D and E) Capacitive behavior of TNO and N-C@TNO at 0.1mv s^-1; (F) Capacitive contribution ratios at different scan rates. TNO: TiNb₂O₇, titanium niobium oxide; N-C: N-doped carbon.