Graphene gel is an excellent material for capacitive deionization (CDI) because of its high specific surface area, three-dimensional structure and binder-free preparation. Current studies have been primarily focused on the design and synthesis of new graphene gel materials. However, there have been no studies comparing the desalination performance of graphene hydrogel (GH) and graphene aerogel (GA), the two primary CDI materials. In this work, GH and GA were synthesized and applied in CDI. A range of characterization methods were used to analyze the microstructure of the GA and GH electrode materials. The results showed that the electrosorption capacities of GH and GA were 49.34 and 45.88 mg g⁻¹, respectively, in sodium chloride solution with an initial concentration of 500 mg L⁻¹ at 2.0 V. A water-enhanced function mechanism was proposed to explain the differences in desalination performance.

石墨烯凝胶因其高比表面积，三维结构和无粘合剂制备而成为用于电容性去离子（CDI）的极佳材料。当前的研究主要集中在新型石墨烯凝胶材料的设计和合成上。但是，还没有研究比较两种主要CDI材料石墨烯水凝胶（GH）和石墨烯气凝胶（GA）的脱盐性能。在这项工作中，GH和GA被合成并应用于CDI。一系列表征方法用于分析GA和GH电极材料的微观结构。结果表明，在初始浓度为500 mg L ^-1的氯化钠溶液中，GH和GA的电吸附容量分别为49.34和45.88 mg g ^-1。 在2.0 V下。提出了一种水增强功能机制来解释淡化性能的差异。