Fig. 4: Electrochemical performance and desalination ability. | Nature Communications

Fig. 4: Electrochemical performance and desalination ability.

From: Unveiling the neglected role of oxygen doping in nitrogen-doped carbon for enhanced capacitive deionization performance

Fig. 4

a CV curves at 10.0 mV s−1 and (b) GCD profiles at 1.0 A g−1 of NC-G and ONC-S; (c) GCD profiles of ONC-S at various current densities; (d) capacitive contributions of ONC-S at 40 and 50 mV s−1; (e) ex-situ Raman spectra of the ONC-S electrode upon charging/discharging. Desalination performance: (f) plots of the SAC dynamics over time and (g) Ragone plots of ONC-S and NC-G; (h) plots of the SAC dynamics over time at various voltages and (i) SAC values at different salt concentrations for ONC-S; (j) cycling performance of ONC-S at 1.2 V in a 500 mg L−1 NaCl solution; (k) initial and final SAC values during cycling. Error bars in (i) represent the standard deviation and were calculated on the basis of three experimental data points.

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