Wang Hao, Liu Yong, Li Yuquan, Xu Xingtao, Lu Ting, Pan Likun
Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
School of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, China.
Mater Horiz. 2024 Oct 28;11(21):5209-5219. doi: 10.1039/d4mh00773e.
With the gradually increasing requirement for freshwater, capacitive deionization (CDI) as a burgeoning desalination technique has gained wide attention owing to its merits of easy operation, high desalination efficiency, and environmental friendliness. To enhance the desalination performance of CDI, different CDI architectures are designed, such as membrane CDI, hybrid CDI, and flow-electrode CDI. However, these CDI systems have their own drawbacks, such as the high cost of membranes, capacity limitation of carbon materials and slurry blockage, which severely limit their practical application. Notably, rocking-chair CDI (RCDI) composed of symmetric electrode materials delivers excellent desalination performance because of its special dual chamber structure, which can not only break through the capacity limitations of carbon materials, but also deliver a continuous desalination process. Although RCDI showcases high promise for efficient desalination, few works systematically summarize the advantages and applications of RCDI in the desalination field. This review offers a thorough analysis of RCDI, focusing on its electrode materials, structure designs and desalination applications. Furthermore, the desalination performances of RCDI and other CDI architectures are compared to demonstrate the advantages of RCDI and the prospect of RCDI is elucidated.
随着对淡水需求的逐渐增加，电容去离子化（CDI）作为一种新兴的脱盐技术，因其操作简便、脱盐效率高和环境友好等优点而受到广泛关注。为了提高CDI的脱盐性能，人们设计了不同的CDI结构，如膜CDI、混合CDI和流动电极CDI。然而，这些CDI系统都有各自的缺点，如膜成本高、碳材料容量限制和浆料堵塞等，这严重限制了它们的实际应用。值得注意的是，由对称电极材料组成的摇椅式CDI（RCDI）由于其特殊的双室结构而具有优异的脱盐性能，它不仅可以突破碳材料的容量限制，还可以实现连续脱盐过程。尽管RCDI在高效脱盐方面展现出巨大潜力，但很少有研究系统地总结RCDI在脱盐领域的优势和应用。本文综述对RCDI进行了全面分析，重点关注其电极材料、结构设计和脱盐应用。此外，还比较了RCDI与其他CDI结构的脱盐性能，以展示RCDI的优势，并阐明RCDI的前景。
