▎ 摘　　要

NOVELTY - Preparing large-area three-dimensional graphene using composite metal template, comprises e.g. (i) providing metal foam, cleaning, and removing impurity on the surface; (ii) electroplating or depositing the other metal on the metal foam to obtain the composite metal; (iii) placing the composite metal on quartz sample table of CVD growth furnace, evacuating, introducing high-purity argon gas; heating, introducing high-purity hydrogen, incubating, annealing to obtain composite metal foam; and (iv) continuously heating, inletting high pure carbon source gas, controlling the pressure. USE - The method is useful for preparing large-area three-dimensional graphene using composite metal template. ADVANTAGE - The method: produces good quality three-dimensional grapheme. DETAILED DESCRIPTION - Preparing large-area three-dimensional graphene using composite metal template, comprises (i) providing metal foam, cleaning, and removing impurity on the surface; (ii) electroplating or depositing the other metal on the metal foam to obtain the composite metal; (iii) placing the composite metal on quartz sample table of CVD growth furnace, evacuating to 200-300 degrees C, introducing high-purity argon gas at pressure of 100-300 mbar, and keeping the temperature for 1-5 minutes; heating to 550-650 degrees C, introducing high-purity hydrogen at pressure of 100-300 mbar, incubating for 8-12 minutes, annealing to obtain composite metal foam; (iv) continuously heating to 1000-1100 degrees C for 10-30 minutes, inletting high pure carbon source gas, controlling the pressure at 100- 300 mbar, keeping temperature for 5-30 minutes for graphene growth, after finishing growing, closing the carbon source gas, continuously introducing high purity argon gas, controlling pressure at 100- 300 mbar, pulling the heating zone to the other side, fast cooling to 500-600 degrees C, and naturally cooling to room temperature to grow 3D graphene on the surface of the composite metal foam; and (v) removing the composite metal from good growth graphene composite metal foam obtained in the step (iv), cleaning, and drying.