Recently, multichannel membrane capacitive deionization (MC-MCDI) has garnered significant attention due to its remarkable desalination performance over traditional CDI systems. However, for implementation in practical desalination applications, significant advances in the desalination performance of MC-MCDI are still needed, especially in enhancing the engineering design as well as understanding and optimizing the operating conditions. In this study, we propose an innovative approach to enhance the desalination performance of MC-MCDI by optimizing the operational conditions, such as the half-cycle time (HCT) for the charging step, operational cell voltage, salinity of the electrolyte, and feed flow rate. An optimized HCT (3 min) and the reverse-voltage mode (1.2 V and −1.2 V for charging and discharging) led to an increase in cumulative salt adsorption capacity (cSAC) of 49 mg/g, which was calculated based on the total amount of removed ions over 30 min of charging time. Furthermore, a significant cSAC of 160 mg/g was achieved with a highly saline electrolyte in the side channel (500 mM NaCl), while the change in the feed flow rate could maximize the ion removal rate of 0.035 mg/g/s. With these optimized operational conditions, MC-MCDI is highly stable over 100 cycles with an average charge efficiency of 96%. These results provide valuable insight into how desalination performance can be drastically enhanced through judicious engineering of the system, and selection of operational conditions. Finally, these results suggest that MC-MCDI has a high potential to become a remarkably effective cell design for industrial and environmental applications. Also, we emphasize the generality of our electrochemical configuration, which can be adapted also with novel electrode materials that can further enhance the overall system performance.

近来，由于多通道膜电容去离子（MC-MCDI）的脱盐性能优于传统CDI系统，因此受到了广泛关注。然而，为了在实际的脱盐应用中实施，仍需要MC-MCDI的脱盐性能取得重大进步，尤其是在增强工程设计以及理解和优化操作条件方面。在这项研究中，我们提出了一种创新的方法，可通过优化操作条件来增强MC-MCDI的脱盐性能，例如充电步骤的半周期时间（HCT），操作电池电压，电解质盐度和进料流量。优化的HCT（3分钟）和反向电压模式（1.2 V和-1。2 V用于充电和放电）导致累积盐吸附量（cSAC）增加49 mg / g，这是根据充电30分钟内离子的去除总量计算得出的。此外，在侧通道（500 mM NaCl）中使用高盐度的电解质可实现160 mg / g的显着cSAC，而进料流速的变化可使离子去除率最大达到0.035 mg / g / s。通过这些优化的运行条件，MC-MCDI在100个循环中保持高度稳定，平均充电效率为96％。这些结果提供了宝贵的见解，可通过明智的系统工程设计和选择运行条件来极大地提高淡化性能。最后，这些结果表明，MC-MCDI具有成为工业和环境应用中非常有效的电池设计的巨大潜力。另外，我们强调了电化学配置的一般性，也可以用新型电极材料进行调整，以进一步提高整体系统性能。