NOVELTY - Preparing electrode for super-capacitor, involves: a) forming ultrafine carbon fibers having specific surface area of at least 200 m2/g and graphitization degree corresponding to d002 of less than or equal to 0.36 nm by electro-spinning melt or solution of carbon fiber-precursor polymer to obtain spun fibers and carbonizing spun fibers; b) attaching mat-type carbon substrate comprising ultrafine carbon fibers on collector using binder, or forming carbon substrate by coating mixture of ground form of ultrafine carbon fibers and binder on collector; and c) forming metal oxide thin layer on the substrate.    USE - For preparing an electrode for a super-capacitor (claimed) used in fuel cell-driven or hybrid automobiles.    ADVANTAGE - The method develops an electrode having a high specific surface area and a good electric conductivity and is capable of maintaining a high specific capacitance during high-speed charging and discharging cycles. The electro-spinning employed in the present method is designed such that an inert gas or air can be injected together with the liquid through an electro-spinning nozzle in a manner similar to a melt-blown method in order to increase the productivity.    DETAILED DESCRIPTION - Preparing an electrode for a super-capacitor, involves: a) forming ultrafine carbon fibers having specific surface area of at least 200 m2/g (Brunauer, Emmett, Teller (BET)) and graphitization degree corresponding to d002 of less than or equal to 0.36 nm by electro-spinning a melt or a solution of carbon fiber-precursor polymer to obtain spun fibers and carbonizing the spun fibers; b) attaching mat-type carbon substrate comprising ultrafine carbon fibers on a collector using a binder, or forming a carbon substrate by coating a mixture of ground form of ultrafine carbon fibers and binder on the collector; and c) forming metal oxide thin layer on the substrate.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic diagram for the preparation of the electrode for a super-capacitor.