Abstract The issue of insufficient freshwater resources has become a worldwide problem, restricting social and economic development. As a promising technology, capacitive deionization (CDI) has been developed to address this problem. In this work, MoS2/g-C3N4 composite with a high supercapacitor performance was successfully synthesized and assembled as the CDI electrode material with its electrochemical properties deeply evaluated. The results demonstrated that the MoS2/g-C3N4-based electrode demonstrated a large specific capacitance of 118.3 F/g (at 1 A/g) and a remarkable rate capacitance retention of 52.16% (61.7 F/g) (at 10 A/g). Moreover, the MoS2/g-C3N4-based electrode exhibited obvious improvement in desalination performance with the maximum electrosorption capacity of 24.5 mg/g. The hierarchical architecture, enhanced conductivity, large surface area, and negative zeta potential of MoS2/g-C3N4 composite facilitated the fast diffusion of ions. The enhanced ions adsorption performance of the MoS2/g-C3N4-based electrode was evaluated based on a capacitive contribution of 85.26% and a diffusion-controlled contribution of 14.74%.

中文翻译：

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使用 MoS2/g-C3N4 电极进行电容去离子

摘要 淡水资源不足已成为世界性问题，制约着社会经济发展。作为一项有前途的技术，已经开发了电容去离子 (CDI) 来解决这个问题。在这项工作中，成功合成并组装了具有高超级电容器性能的 MoS2/g-C3N4 复合材料作为 CDI 电极材料，对其电化学性能进行了深入评估。结果表明，基于 MoS2/g-C3N4 的电极表现出 118.3 F/g（1 A/g）的大比电容和 52.16%（61.7 F/g）（10 A/g）的显着倍率电容保持率。 G）。此外，MoS2/g-C3N4 基电极在脱盐性能方面表现出明显改善，最大电吸附容量为 24.5 mg/g。分层结构，增强导电性，MoS2/g-C3N4 复合材料的大表面积和负 zeta 电位促进了离子的快速扩散。基于 85.26% 的电容贡献和 14.74% 的扩散控制贡献，评估了基于 MoS2/g-C3N4 的电极增强的离子吸附性能。