▎ 摘　　要

NOVELTY - Preparing carbon nano tube-graphene core-shell material comprises e.g. (i) taking polyvinyl alcohol powder, mixing with water to obtain material A, preparing the material A into melt, and drying, spreading into CNT/chloroauric acid/PVA solid mixture film, continuing to maintain under stirring and heating for to obtain the melt, (ii) growth of graphene on the surface of CNT/chloroauric acid/PVA solid mixture membrane using DC arc plasma spray chemical vapor deposition apparatus comprises (a) placing the CNT/ chloroauric acid/PVA solid mixture membrane in deposition chamber of DC arc plasma spray chemical vapor deposition apparatus, vacuuming the deposition chamber to below 1 Pa, simultaneously spraying hydrogen and inert gas into the deposition chamber, and activating magnetic field to cause temperature in the deposition chamber for preheating the deposition chamber arc plasma spray chemical vapor deposition apparatus. USE - The shell material is useful for increasing the transmission conductivity in flexible capacitor (claimed). ADVANTAGE - The shell material: has excellent structural stability and superior electrochemical performance, utilizes specific surface area; and improves the electron transporting ability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for carbon nano tub-graphene core-shell material obtained by the above mentioned method. Preparing carbon nano tube-graphene core-shell material comprises (i) taking 1.0-2.6 pts. wt. polyvinyl alcohol powder, mixing with 15-50 pts. wt. water to obtain material A, preparing the material A into melt, and drying, spreading into CNT/chloroauric acid/PVA solid mixture film having thickness of 2-3 mm, where the method for preparing material A into melt by stirring the material A and heating at 180-240 degrees C, when the material A starts to become cloudy, 0.1-0.5 pts. wt. carbon nano tube powder and 1-5 pts. wt. chloroauric acid ethanol solution are added to the material A, continuing to maintain under stirring and heating for 25-70 minutes to obtain the melt, (ii) growth of graphene on the surface of CNT/chloroauric acid/PVA solid mixture membrane using DC arc plasma spray chemical vapor deposition apparatus comprises (a) placing the CNT/ chloroauric acid/PVA solid mixture membrane in deposition chamber of DC arc plasma spray chemical vapor deposition apparatus, vacuuming the deposition chamber to below 1 Pa, simultaneously spraying H2 and inert gas into the deposition chamber, until the pressure in the deposition chamber is 2500-4000 Pa, the flow ratio of hydrogen and inert gas is (1.5-2.0): (2.0-3.0), (b) flow rate is higher than the injection of hydrogen and inert gas and the pressure in the deposition chamber is always 2500-4000Pa, activating magnetic field to cause temperature in the deposition chamber to 700-900 degrees C, for preheating the deposition chamber, applying the magnetic field and arc simultaneously after preheating for 3-5 minutes, treating the arc-blasted hydrogen generated plasma CNT/chloroauric acid/PVA solid mixture membrane for 5-7 minutes, under the condition that both magnetic field and arc are applied simultaneously, spraying CH to the deposition chamber for 43-10 minutes, where the injection flow rate of methane is 0.2-0.3 l/minutes, and the arc voltage is 50-60V, arc current is 110-120A, and the arc power is 5500-7200W, and the magnetic field voltage is 5-7V.