Multichannel desalination batteries (MC-DBs) have been utilized to enhance the performance of battery electrodes by decoupling the electrodes (side channels) and target brackish water (middle feed channel), enabling independent control of the channels. Nevertheless, the technological level of MC-DB is at an infancy, and further understanding of the role of operating conditions is required for its practical application. In this study, a parametric investigation of the applied current, cutoff voltage, and solution concentration fed to the feed and side channels was performed to improve the electrochemical deionization of MC-DB to achieve low-energy brackish water desalination. With presence of 20 times concentration difference between the feed and side channels, the MC-DB retained approximately 76% of the initial desalination capacity even upon a ten-fold increase in the current density (5–50 A·m⁻²). Moreover, MC-DB exhibiting a salinity gradient minimized the resistance penalty resulting from the low-salinity of brackish water. A high battery-utilization ratio (>80%) was achieved at various feed water concentrations. Up to 73% of the energy consumed for desalination was recovered through modification of the current and cutoff voltage. Consequently, under the optimized conditions, the MC-DB system could desalinate low-salinity brackish water with a substantially reduced energy consumption of 5.5 kJ·mol⁻¹.

多通道脱盐电池 (MC-DB) 已被用于通过将电极（侧通道）和目标苦咸水（中间进料通道）解耦来提高电池电极的性能，从而实现对通道的独立控制。尽管如此，MC-DB的技术水平还处于起步阶段，实际应用还需要进一步了解操作条件的作用。在本研究中，对馈入进料通道和侧通道的外加电流、截止电压和溶液浓度进行了参数研究，以改善 MC-DB 的电化学去离子，从而实现低能量苦咸水淡化。由于进料通道和侧通道之间存在 20 倍的浓度差，^-2 )。此外，MC-DB 表现出的盐度梯度最小化了由于咸水的低盐度导致的阻力损失。在不同的进水浓度下实现了高电池利用率（> 80%）。通过修改电流和截止电压，可回收高达 73% 的脱盐能耗。因此，在优化条件下，MC-DB 系统可以脱盐低盐度苦咸水，能耗显着降低 5.5 kJ·mol ^-1。