▎ 摘　　要

NOVELTY - Reduced graphene dispersion preparation involves mixing 70 ml 98 wt.% concentrated sulfuric acid and 5 ml 25 wt.% nitric acid solution with 3.0 g graphite powder, 1.5 g sodium nitrate and 1.1 g sodium hydrogen sulfate with stirring to prepare mixture. The prepared mixture is transferred to an ice bath for cooling, and then mixed with 9.0 g potassium permanganate and 1 g potassium nitrate under vigorous stirring. The reaction system is transferred to a 40 degrees C water bath with stirring at a constant temperature for 30 minutes. 150 ml deionized water and 15 ml 30 wt.% hydrogen peroxide are added in the water bath at 90 degrees C with stirring for 15 minutes. The resulting mixture is suction filtered and washed with 250 ml 3.5 wt.% diluted hydrochloric acid to remove metal ions. The obtained solid filter cake is dried in air, diluted with deionized water to obtain graphene oxide dispersion by sonication. USE - Method for preparing reduced graphene dispersion for aviation and for preparing batteries (claimed). DETAILED DESCRIPTION - The dispersion is placed in a dialysis bag for dialysis to remove residual acid and metal ions, where water is changed once a day for dialysis for seven days. The dialyzed graphene oxide dispersion is removed and centrifuged at 4000 revolutions per minute, where the underlying unoxidized or incompletely oxidized graphite powder is discarded. 27 mu l hydrazine hydrate and 2 mu l azocarboxamide and ultrasonically dispersed for 5 minutes, and then placed in an oil bath at 95 degrees C with stirring for 1 hour. The obtained product is filtered through gauze to obtain the reduced graphene dispersion.