▎ 摘　　要

NOVELTY - A carbon support electrode comprises a porous planar carbon fiber support having surfaces (a, b) facing each other, and 2-30 pts. wt. ion adsorption layer arranged on at least one of the surface (a) and the surface (b) or between the surfaces (a, b) of the carbon fiber support and distributed inside the carbon fiber support. The ion adsorption layer includes conductive carbon and 3-30 pts. wt. binder resin carbide based on total weight of 100 pts. wt. ion adsorption layer, and a hydrophilic functional group containing oxygen and a hydrophilic functional group containing nitrogen are bonded on the surface of carbon fiber constituting the carbon fiber support and surface of the conductive carbon in the ion adsorption layer. The content of the oxygen derived from functional group containing oxygen is 12-19 atomic%, and the content of nitrogen derived from functional group containing nitrogen is 1.5-5.5 atomic%. USE - Carbon support electrode used for vanadium redox flow battery (claimed) for energy storage devices. ADVANTAGE - The carbon support electrode has improved reaction efficiency, charge/discharge capacity and battery efficiency. DETAILED DESCRIPTION - A carbon support electrode comprises a porous planar carbon fiber support having surfaces (a, b) facing each other, and 2-30 pts. wt. ion adsorption layer arranged on at least one of the surface (a) and the surface (b) or between the surfaces (a, b) of the carbon fiber support, and distributed inside the carbon fiber support. The ion adsorption layer includes conductive carbon and 3-30 pts. wt. binder resin carbide based on total weight of 100 pts. wt. ion adsorption layer, and a hydrophilic functional group containing oxygen and a hydrophilic functional group containing nitrogen are bonded on the surface of the carbon fiber constituting the carbon fiber support and surface of the conductive carbon in the ion adsorption layer. The ratio (atomic %) of an oxygen derived from the oxygen-containing functional group on the surface of the carbon support electrode to a nitrogen derived from the nitrogen-containing functional group is 3:1-10:1. The content of the oxygen derived from functional group containing oxygen is 12-19 atomic%, and the content of nitrogen derived from functional group containing nitrogen is 1.5-5.5 atomic%.