▎ 摘　　要

NOVELTY - Preparation of catalytic material-modified membrane involves (s1) dispersing carbon nanotube in deionized water, homogenizing to obtain 1-4 mg/ml dispersion (A), (s2) dissolving indium phthalocyanine in 88-98 wt.% sulfuric acid to obtain indium phthalocyanine solution (B), (s3) dripping the solution (B) into dispersion (A) to obtain a mixed solution (C) of indium phthalocyanine/carbon nanotube, (s4) filtering the solution (C), washing with deionized water, freezing, drying, collecting the solid to obtain indium phthalocyanine/carbon nanotube catalyst, and (s6) coating the coating slurry containing 5-7 %mass indium phthalocyanine/carbon nanotube catalyst, 3-2 %mass conductive agent, and 2-1 %mass binder on the positive electrode of the lithium battery commercial membrane by extrusion coating, and vacuum-drying. The binder is polyvinylidene fluoride, styrene-butadiene rubber emulsion, carboxymethyl cellulose, polyacrylic acid, polyacrylonitrile and/or polyacrylic ester. USE - Preparation of catalytic material-modified membrane used for high-capacity sulfur-containing positive electrode of sulfur-lithium battery. ADVANTAGE - The method enables simple preparation of catalytic material-modified membrane exhibiting excellent electrochemical performance and promoting the commercialization of the sulfur-lithium battery system, and the catalytic material is safe and environmentally-friendly. DETAILED DESCRIPTION - Preparation of catalytic material-modified membrane involves (s1) dispersing the carbon nanotube in deionized water, homogenizing at 28-40 KHz ultrasound for 0.5-2 hours to obtain 1-4 mg/ml uniform dispersion (A), (s2) controlling the temperature at 0-5℃, dissolving indium phthalocyanine in 88-98 wt.% sulfuric acid to form 2-10 mg/ml indium phthalocyanine solution (B), (s3) stirring the dispersion (A) at 200-300 rpm, dripping the solution (B) at 150-300 L/minute and 0-5℃ into dispersion (A) to form a mixed solution (C) of indium phthalocyanine/carbon nanotube with the mass ratio of 2-4:8-6, (s4) filtering the solution (C), washing to neutral with deionized water, freezing, drying at -20℃ to 50℃ for 8-24 hours, collecting the solid to obtain an indium phthalocyanine/carbon nanotube catalyst, and (s6) coating the coating slurry containing 5-7 %mass indium phthalocyanine/carbon nanotube catalyst, 3-2 %mass conductive agent, and 2-1 %mass binder on the positive electrode of the lithium battery commercial membrane by extrusion coating, vacuum-drying at 50-80℃and 133 Pa for 12-24 hours. The conductive agent is carbon nanotubes, graphene, acetylene black and/or Super P (RTM: conductive carbon black). The binder is polyvinylidene fluoride, styrene-butadiene rubber emulsion, carboxymethyl cellulose, polyacrylic acid, polyacrylonitrile and/or polyacrylic ester. An INDEPENDENT CLAIM is included for the catalytic material-modified membrane, which comprises the active material of the positive electrode material is elemental sulfur, and the sulfur load on the side of the electrode is 2-6 mg/cm2.