Abstract Cationic diodes based on Nafion ionomer coated microhole array substrates are combined with an anion conducting membrane to give an AC-electricity driven desalination or salination system. The combination of cationic diode with anionic resistor allows a 3D-printed four-chamber system to be configured with two internal chambers to extract and/or accumulate salt. Three configurations are demonstrated combining desalination and salination for an aqueous 250 mM NaCl solution. For a proof-of-concept device, 50% desalination/salination is demonstrated. The charge efficiency is estimated to be only 12%, limited mainly due to (i) resistivity lowering rectification, (ii) rectification ratio limitations for the array of microholes, (iii) insufficient stability of ionomer membranes under AC-pulse-driven operation. Perspectives for improvements and for future desalination/salination applications are given.

中文翻译：

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基于Nafion阳离子整流器的交流驱动海水淡化/盐化系统

摘要 基于 Nafion 离聚物涂层微孔阵列基板的阳离子二极管与阴离子导电膜结合，形成交流电驱动的海水淡化或盐化系统。阳离子二极管与阴离子电阻器的组合允许 3D 打印的四室系统配置有两个内部室来提取和/或积累盐分。展示了三种配置，结合了 250 mM NaCl 水溶液的脱盐和盐化。对于概念验证设备，演示了 50% 的脱盐/盐化。充电效率估计仅为 12%，主要是由于 (i) 电阻率降低整流，(ii) 微孔阵列的整流比限制，(iii) 离聚物膜在交流脉冲驱动操作下的稳定性不足而受到限制。