Abstract: By adjusting the components of the tape-casting slurry, porous nickel electrode structures were designed to study their effects on the hydrogen production and energy storage performance of alkaline water electrolysis. Using Ni powder as the framework, porous nickel electrodes were prepared through the tape-casting process. We investigated how nickel powder particle size, the amount of composite binder, and the size and volume percentage of PMMA pore-forming agents affect the electrode structure and electrochemical performance. By combining polarization curves, SEM characterization, and contact resistance testing, we analyzed the relationship between structure and performance. The results show that Ni powder with a small particle size of 15-53μm helps form a continuous and stable 3D framework and enhances mass transfer, with a current density of 632.2mA/cm² at 2.0 V. The best green body quality is achieved when the composite binder is 0.4 g or 0.5 g. PMMA particles of 70μm and 100μm can create open large-pore channels, improving gas-liquid transport inside the electrode, with current densities at 2.0 V reaching 698.2mA/cm² and 762.4mA/cm², respectively. When the PMMA volume percentage is 40% or 50%, pore formation and electrode integrity can be balanced, with current densities at 2.0 V reaching 632.2mA/cm² and 680.5mA/cm², respectively.