▎ 摘　　要

NOVELTY - Preparation of composite carbon material involves adding ethanol aqueous solution, 0.8-2 wt.% pyrrole, 0.25-0.5 %mass oxidant and 1-10 %mass active carbon material with specific surface of 300-2000 m2/g to hydrothermal reaction vessel to form a mixed solution, stirring to disperse the carbon material, hydrothermally reacting at 140-240degrees Celsius for 8-24 hours to obtain solid, drying, re-dispersing 2-20 %mass dry solid in 1-10 %mass polyvinylpyrrolidone aqueous solution, stirring, drying the solid, sintering in nitrogen atmosphere at 600-1200degrees Celsius for 1-10 hours, preferably at 750-850degrees Celsius for 4-6 hours, transferring to carbon dioxide atmosphere, and activating at 600-1200degrees Celsius for 1-10 hours, preferably at 750-850degrees Celsius for 4-6 hours. The water/ethanol volume ratio is 0.5-1.5:1. The oxidant is ammonium persulfate, sodium persulfate, potassium persulfate, hydrogen peroxide, and/or potassium permanganate, preferably ammonium persulfate. USE - Preparation of composite carbon material used in lead-carbon battery electrode i.e. negative electrode (all claimed). ADVANTAGE - The prepared composite carbon material effectively reduces the peak current density of hydrogen evolution during the charging process of the lead-carbon battery, reduces sulfation of the battery, and prolongs the cycle life of the battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of the composite carbon material in lead-carbon battery electrode.