▎ 摘　　要

NOVELTY - Polysulfone-zirconium dioxide composite diaphragm includes an organic component polysulfone, an inorganic component zirconium dioxide, and one or multiple sheet-layer hydrophilic inorganic substances. The sheet-layer hydrophilic inorganic substance is selected from graphene, graphene oxide, boron nitride (BN), molybdenum oxide, molybdenum disulfide, and layered double metal hydroxides. The low-valent metal ion in the layered double hydroxides (LDHs) is magnesium (II), nickel (II), iron (II), cobalt (II), and manganese (II). The high-valent metal ion in the LDHs is aluminum (III), iron (III), and titanium (IV). USE - Polysulfone-zirconium dioxide composite diaphragm used in alkaline electrolytic water device for producing hydrogen from alkaline water. ADVANTAGE - The polysulfone-zirconium dioxide composite membrane has good dispersibility, uniform aperture and distribution, excellent mechanical performance, low membrane surface resistance and strong gas barrier property. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a method for preparing polysulfone-zirconium dioxide composite diaphragm, which involves dispersing zirconium dioxide and sheet-layer hydrophilic inorganic substances in an organic solvent at room temperature to obtain a mixed solution, grinding and dispersing the mixed solution for 0.5-2 hours, dispersing at 80-120℃ for 0.5-4 hours, adding polysulfone in batches under stirring for 6-10 hours, scrape-coating the obtained casting solution on a glass plate, pre-evaporating at room temperature for 5-300 seconds, immersing in mixed non-solvents at -25-30℃, performing transformation, condensation, film formation, and cleaning for 5-30 minutes to remove the solvent to achieve phase inversion, soaking the obtained membrane in deionized water at 50-100℃ for 24-48 hours, and removing the residual solvent in the membrane to prepare a polysulfone-zirconium dioxide composite membrane; and (2) a method for using polysulfone-zirconium dioxide composite diaphragm in alkaline electrolysis applications in water installations, which involves using pure nickel mesh foam as cathode and anode, putting pure nickel mesh foam in a hot press, hot pressing at 80-120℃ for 0.5-10 minutes, compressing the thickness to 150-200 µm, putting the polysulfone-composite separator sandwiched between two nickel mesh foam electrodes to obtain a membrane electrode assembly, sandwiching the membrane electrode assembly between the cathode and the anode to assemble the electrolytic water device to perform electrochemical test by soaking in the anode and catholyte, and obtaining polarization curve by measuring the battery voltage at different current densities under.