The yolk-shell porous carbon spheres (YS-PCSs) with hierarchically nanoarchitecture were fabricated via a gradient sol-gel process combined with surfactant-directed co-assembly at different carbonized temperature of 600 °C, 700 °C, and 800 °C. The samples were used as electrode materials in capacitive deionization (CDI) process to measure their desalination performances. The results demonstrated that YS-PCS700 electrode displayed the best capacitive behavior and the lowest ions transfer resistance among all YS-PCS samples, and the electrosorption capacity reached up to 19.77 mg g⁻¹ with 1.2 V applied voltage when the initial concentration of NaCl solution was 1000 mg L⁻¹. The enhanced CDI performance was presumably attributed to the high specific surface area (1058 m² g⁻¹), the large pore volume (1.77 cm³ g⁻¹) and the good wettability. Moreover, YS-PCS700 electrode still maintained excellent electrosorption capacity after 20 cycles CDI experiments under the same experimental conditions, indicating wonderful regeneration ability. It was desirable to develop the YS-PCS700 as a promising and alternative electrode material in CDI application.

通过梯度溶胶-凝胶工艺结合表面活性剂定向共组装，在600°C，700°C和800°C的不同碳化温度下，制备出具有分级纳米结构的蛋黄壳多孔碳球（YS-PCS）。样品在电容去离子（CDI）过程中用作电极材料，以测量其脱盐性能。结果表明，在所有YS-PCS样品中，YS-PCS700电极均表现出最佳的电容性能和最低的离子转移电阻，并且当初始浓度为NaCl溶液时，在施加1.2 V电压时，电吸附容量达到19.77 mg g ^-1。为1000mg L ^-1。CDI性能的提高大概归因于高比表面积（1058 m ² g ^-1），大的孔体积（1.77 cm ³  g ^-1）和良好的润湿性。此外，在相同的实验条件下，经过20个循环的CDI实验，YS-PCS700电极仍保持了优异的电吸附能力，表明其出色的再生能力。希望将YS-PCS700开发为CDI应用中有希望的替代电极材料。