30results about How to "Avoid re-stacking" patented technology

The invention relates to an intercalation agent for rapidly stripping graphite for mass production of high-quality graphene. The intercalation agent is prepared from transitional metal halogen salt, anitrogen source substance and an organic solvent; and a mass ratio of the transitional metal halogen salt to the nitrogen source substance to the organic solvent is (1 to 10): 1: (2 to 10). The transitional metal halogen salt can form eutectic crystals with the nitrogen source substance or the organic solvent, a melt point of the eutectic crystal is lower than the melt point of each component, the mixed intercalation agent is liquid at room temperature, the intercalation agent is intercalated into the graphite to form a graphite interlayer compound, so that the reaction temperature, the preparation cost and the difficulty are reduced; and meanwhile, the nitrogen source substance can also form a hydrogen bond with the organic solvent, so that a combined body of the nitrogen source substance and the organic solvent exists stably among the layers of the graphene, the interlayer accumulation of the prepared graphene can be avoided, and the stripping efficiency and the product quality canbe improved. The intercalation agent does not have chemical reaction in the ball milling process, and can be separated from the graphite interlayer compound in a centrifuging manner, and the separatedintercalation agent can be recycled, so that energy can be saved, and the environment can be protected.

The invention provides a graphene metal composite supercapacitor electrode material, which is a composite product obtained by compounding flake graphene, flake nano-metal and / or flake nano-metal alloy, and conductive polymer, and the conductive polymer is embedded in the phase Adjacent metal sheets and graphene sheets; the preparation method adds a certain proportion of expanded graphite flakes, metal and / or metal alloys, conductive polymers, and fusible polymers into a graphene peeling machine, and co-grinds under vacuum After 10 to 16 hours, prepare a mixed powder material of flake graphene, flake nano-metal and / or flake nano-metal alloy, and granular polymer; pressurize the mixed powder material in the reactor Or vacuumize, heat up to the melting point of the meltable polymer, keep it warm for 2 to 4 hours, and then lower it to room temperature to obtain the composite electrode material. When it is implemented, it can prevent graphene from agglomerating and stacking, increase the available surface area of ​​graphene, and has high electrochemical performance.

The invention provides a graphene doped metallic oxide electrode material and a preparation method thereof, and relates to the technical field of electrochemical materials. According to the graphene doped metallic oxide electrode material, graphene is firstly prepared through an electrolysis method, then the graphene is mixed with a mixed salt solution of Ru, Sn and Co, and the mixture is calcinedat the temperature of 220 to 300 DEG C after drying, so that the graphene and metallic oxide composite electrode material is obtained. According to the graphene doped metallic oxide electrode material, metallic oxide and graphene are introduced for compounding, so that metal nanoparticles are embedded into adjacent graphene sheets, a double electric layer electrode material and a faradaic pseudocapacitance electrode material are reasonably compounded, and the material is good in electrical conductivity and chemical stability and has ideal specific capacitance.