fig4

Figure 4. Quantitative analysis of the capacitive contribution of NCM/AC cathodes. (A) Impedance comparison of three NCM/AC composite cahodes; (B) CV curves of NCM9055/AC at different scan rates; (C) Relationship between the capacitive contribution and scan rate for NCM9055/AC cathode; (D) Logarithmic relationship between the peak current and scan rate for NCM9055/AC cathode; (E) GITT curves of NCM9055/AC cathode; (F) Capacitive contribution ratios of NCM9055/AC cathode at different scan rates. NCM: Lithium nickel cobalt manganese oxide; AC: activated carbon; CV: cyclic voltammetry; GITT: galvanostatic intermittent titration technique.