Alkaline water electrolysis is the most mature and most extensive in-scale hydrogen production technology. For scaled-up electrolyzers, the negative effect of the bubbles formed on the electrodes contributes to high energy consumption and hinders the further expansion of this technology. This study developed a planar cyclonic electrolyzer to improve bubble detachment. The effects of the hydrodynamics on the bubble detachment diameter and current density were studied. According to a proof-of-concept experiment, an increase in the electrolyte velocity led to a gradual decrease in the bubble detachment diameter and a significant increase in the current density. At an applied voltage of 5 V, the detached bubble size decreased from 160 to 82 microns when the electrolyte velocity increased from 0.33 to 2.33 m/s. Meanwhile, a marked rising in the current density from 0.43 to 1.71 A/cm² was observed. The significance of bubble detachment from an electrode on electrolysis efficiency was discussed. Furthermore, the diaphragm-free separation of hydrogen and oxygen bubbles can be possibly achieved with this novel design.

碱性水电解是最成熟、最广泛的规模化制氢技术。对于放大的电解槽，电极上形成的气泡的负面影响会导致高能耗并阻碍该技术的进一步扩展。本研究开发了一种平面旋风电解槽以改善气泡分离。研究了流体动力学对气泡分离直径和电流密度的影响。根据概念验证实验，电解质速度的增加导致气泡分离直径逐渐减小，电流密度显着增加。在施加 5 V 的电压下，当电解质速度从 0.33 增加到 2.33 m/s 时，分离的气泡尺寸从 160 微米减小到 82 微米。同时，观察到^{2 个。}讨论了气泡脱离电极对电解效率的影响。此外，通过这种新颖的设计，可以实现氢气和氧气气泡的无隔膜分离。