Advancing electrodeionization with conductive ionomer binders that immobilize ion-exchange resin particles into porous wafer substrates
Advancing electrodeionization with conductive ionomer binders that immobilize ion-exchange resin particles into porous wafer substrates
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DOI：
10.1038/s41545-020-0052-z
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发表时间：
2020-03
期刊：
影响因子：
11.4
通讯作者：
V. M. Palakkal;L. Valentino;Q. Lei;Subarna Kole;Yupo J. Lin;C. Arges
中科院分区：
文献类型：
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作者：
V. M. Palakkal;L. Valentino;Q. Lei;Subarna Kole;Yupo J. Lin;C. Arges
电去离子（EDI）是一种采用离子交换膜和树脂颗粒的电驱动分离技术。在外加电场的影响下发生去离子化，促进树脂的连续再生并补充离子导电性。虽然EDI在商业上用于超纯水生产，但需要材料创新来提高脱盐性能和处理替代供水的能源效率。本工作报告了一类新的离子交换树脂晶片（RWs）与离子导电粘合剂，表现出卓越的离子导电性比传统的RWs，含有非离子聚乙烯粘合剂的3-5倍的改善。并入EDI堆栈（RW-EDI）导致增加的脱盐率和减少的能源消耗相比，传统的RWs。水分裂现象也在RW中进行了研究，在这项工作中的外部实验装置。总之，这项工作表明，欧姆电阻可以大大削减与离聚物粘合剂RW在稀盐浓度。
Electrodeionization (EDI) is an electrically driven separations technology that employs ion-exchange membranes and resin particles. Deionization occurs under the influence of an applied electric field, facilitating continuous regeneration of the resins and supplementing ionic conductivity. While EDI is commercially used for ultrapure water production, material innovation is required for improving desalination performance and energy efficiency for treating alternative water supplies. This work reports a new class of ion-exchange resin-wafers (RWs) fabricated with ion-conductive binders that exhibit exceptional ionic conductivities—a 3–5-fold improvement over conventional RWs that contain a non-ionic polyethylene binder. Incorporation into an EDI stack (RW-EDI) resulted in an increased desalination rate and reduced energy expenditure compared to the conventional RWs. The water-splitting phenomenon was also investigated in the RW in an external experimental setup in this work. Overall, this work demonstrates that ohmic resistances can be substantially curtailed with ionomer binder RWs at dilute salt concentrations.