石墨毡集流体提升流动电极电容去离子脱盐性能

针对流动电极电容去离子技术(FCDI)中活性炭利用率低的问题，采用三维多孔石墨毡充当集流体，强化系统的电子转移，提升脱盐性能。结果表明，石墨毡的引入使FCDI系统的脱盐效果提升了175%，并且将脱盐能耗降低了40%。通过分别比较石墨毡和活性炭对于系统脱盐效果的贡献，发现石墨毡主要是通过强化活性炭与集流体之间的电子传递，实现FCDI系统脱盐效率的提升。同时，阴阳极侧电子传递实验也证实了石墨毡的引入的确提升了集流体与活性炭之间的电子传递。这项研究解决了FCDI系统中活性炭的低利用率问题，为FCDI技术的应用与推广提供了理论上的指导。

Enhanced desalination performance of flow electrode capacitive deionization by introduction of graphite felt as current collector

As a new desalination technology, flow electrode capacitive deionization (FCDI) has received great attention. However, the poor electrical conductivity of activated carbon used in FCDI system has an adverse effect on its desalination performance. Therefore, in this study, three-dimensional porous graphite felt was introduced as current collector to increase the utilization of activated carbon in the flow electrode, so as to improve the electron transfer and the desalination performance of the FCDI system. The results showed that the introduction of graphite felt increased the desalination rate of FCDI by 175% and reduced the power consumption per unit desalination by 40%. By comparing the contribution rate to FCDI desalination between graphite felt and activated carbon, it was shown that graphite felt improved the desalination performance of FCDI mainly by strengthening the electron transfer between activated carbon and current collector. The experiment of electron transfer between cathode and anode confirmed that the introduction of graphite felt promoted the electron transfer between current collector and activated carbon. This study solves the problem of low utilization of activated carbon in FCDI system and provides a theoretical guidance for the popularization and application of FCDI.