Abstract:
As global demands for clean energy and sustainable development continue to grow, alkaline water electrolysis has emerged as a key technology for the production of green hydrogen, becoming a core technology in the domestic hydrogen energy industry. This study aims to screen and optimize commonly used electrode and membrane materials in the market, clarifies the current performance status of commercial electrode and membrane materials, and further investigates the impact of various components on electrolysis energy consumption. The results show that electrode materials doped with transition metal elements can significantly enhance electrolysis efficiency, demonstrating excellent electrocatalytic performance. Single cells with cathode materials doped with Mo elements can achieve a current density of 425 mA/cm
2 at 1.8 V@80 ℃. Additionally, composite membrane materials with low surface resistance and high wettability exhibit outstanding overall cell performance. For electrode materials containing transition metal elements, the mass transfer overpotential gradually becomes the main limiting factor as current density increases. This study provides a design basis for the development of the next generation of high-efficiency alkaline water electrolyzers, contributing to further improvements in electrolysis efficiency and reductions in energy consumption, thereby promoting the continuous advancement of alkaline water electrolysis hydrogen production technology.