▎ 摘　　要

NOVELTY - A system comprises: a device containing a hybrid composite that comprises tubular carbon and graphene in the form of graphene flake or graphene nano platelets. USE - In conductive paint; conductive lacquer; electromagnetic shielding; conductive ink adapted for use in printed electronics; a conductor or transparent conductor adapted for use in a light emitting diode or in a laser diode; a conductor or transparent conductor adapted for use in a solar cell; an electrical conductor adapted for use in a battery electrode; an electrical conductor; a bipolar plate for use in a fuel cell; an electrocatalyst for use in a fuel cell; a charge transport or a charge generation element for use in a solar cell; a photoconductor; a transistor; a biosensor; a glucose meter; or alcohol detector (all claimed). ADVANTAGE - The hybrid composite exhibits relatively high electro conductivity, relatively good dispersion, and/or relatively good compatibility with other materials. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing (M1) hybrid composite involving pyrolysis of a milled solid carbon source under an unoxidizing environment, when analyzed via X-ray diffraction, the hybrid composite generating peaks at two theta values of 26.5 degrees , 42.5 degrees , and 54.5 degrees , where the composite is produced via a specific catalyst comprised of at least one component containing iron or a combination of a first component comprising iron with a second component that comprises a non-iron metal.