▎ 摘　　要

NOVELTY - Preparing millimeter level graphene annular gas gel involves using 0.1-10 milligram/mL ultrasonic graphene oxide solution, then volatilizing the redundant water at 50-100 degrees C, preferably 95 degrees C to obtain 1-5 wt.% concentrated solution of graphene oxide. The concentrated solution of graphene oxide is dripped with reducing agent in distilled water to form oxidized graphene ring. The graphene oxide reducing agent solution is heated at 0-100 degrees C, preferably 90 degrees C for in situ reduction for 0.1-10 hours, preferably 5 hours to obtain graphene annular hydrogel. USE - Method for preparing millimeter level graphene annular gas gel used in conducting material, absorption material and super capacitor electrode material field (all claimed). DETAILED DESCRIPTION - Preparing millimeter level graphene annular gas gel involves using 0.1-10 milligram/mL ultrasonic graphene oxide solution, then volatilizing the redundant water at 50-100 degrees C, preferably 95 degrees C to obtain 1-5 wt.% concentrated solution of graphene oxide. The concentrated solution of graphene oxide is dripped with reducing agent in distilled water to form oxidized graphene ring. The graphene oxide reducing agent solution is heated at 0-100 degrees C, preferably 90 degrees C for in situ reduction for 0.1-10 hours, preferably 5 hours to obtain graphene annular hydrogel. The obtained graphene annular hydrogel is washed and freeze-dried to obtain graphene annular gas gel with diameter of 1-10 millimeter.