Three Dimensional Coupled Analysis of Two-phase Flow and Ion-convection of Alkaline Water Electrolysis

Two-phase flow and ion transportation three dimensional numerical simulations of alkaline water electrolysis are conducted to clarify the influence of mixing effect with an oxygen bubble on overpotential. The numerical results are shown that not only the concentration distribution, but also electrical potential distribution is transformed with the bubble and the total overpotential is suppressed by mixing the electrolyte with floating force. The suppression of the overpotential is mainly achieved with the suppression of the anode concentration overpotential and solution overpotential.