The structural evolution of 3D-RGO with reduction temperature and its effect on capacitive deionization performance

Abstract

The structure control of electrode materials was one of the sticking points in capacitive deionization (CDI).

Enhanced Capacitive Deionization Performance of Ti3C2Tx/C via Structural Modification Assisted by PMMA-Derived Carbon Spheres

“…The effects of voltage and concentration of the NaCl solution on the desalination capacity of Ti 3 C 2 T x /C are further investigated. As shown in Figure a, the ion adsorption capacity of Ti 3 C 2 T x /C shows an improving trend when increasing the applied voltage due to the larger electric field driving force brought by the higher voltage . As shown in Figure b, as the voltage decreases from 1.2 to 0.8 V, the change of decrease in the NaCl solution conductivity is very significant, indicating that it is an effective and simple approach to enhance the desalination capacity of the electrode material only by adjusting the voltage to 1.2 V. Moreover, Ti 3 C 2 T x /C exhibits increasing desalination capacity with increasing concentration of the NaCl solution since a higher concentration gradient reduces the ion migration and diffusion resistance .…”

“…As shown in Figure 7a, the ion adsorption capacity of Ti 3 C 2 T x /C shows an improving trend when increasing the applied voltage due to the larger electric field driving force brought by the higher voltage. 43 As shown in Figure 7b, as the voltage decreases from 1.2 to 0.8 V, the change of decrease in the NaCl solution conductivity is very significant, indicating that it is an effective and simple approach to enhance the desalination capacity of the electrode material only by adjusting the voltage to 1.2 V. Moreover, Ti 3 C 2 T x /C exhibits increasing desalination capacity with increasing concentration of the NaCl solution since a higher concentration gradient reduces the ion migration and diffusion resistance. 44 The desalination cyclic measurement of Ti 3 C 2 T x / C is carried out in a 500 mg L −1 NaCl solution at 1.2 V. Figure 7c shows that Ti 3 C 2 T x /C can still maintain an optimal ion removal capacity of 83.06% in the 10th cycle, exhibiting good cycling stability.…”