NOVELTY - Making of hydrophilic bipolar fuel cell panel (10) containing activated carbon at an outer surface (12) of the bipolar panel, comprises reacting a diazonium salt with an activated carbon, so that a functional group is bound to the activated carbon, in order to increase the hydrophilicity of the bipolar panel at the point of attachment of the functional group.    USE - The bipolar fuel cell panel is useful in automotive industries.    ADVANTAGE - The process provides the bipolar fuel cell panel with increased hydrophilicity (claimed), high corrosion resistance, electrical conductivity and thermally conductivity, high internal resistance and durability. The bipolar fuel cell panel improves the canal water transport, and provides vehicles with more efficiency without any emissions.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a product comprising the carbon-containing fuel cell bipolar panel, where a portion of the carbon is localized at an outer surface of the bipolar panel and the functional group is bounded solely to the carbon that is localized at the outer surface of the bipolar panel, so that the hydrophilicity of the bipolar panel is increased at the point of attachment of the functional group;    (2) a process comprising dissolving sulfanilic acid in a sodium carbonate solution and the adding sodium nitride to form a first solution, cooling the first solution at less than 25 degrees C and adding hydrochloric acid to the cooled first solution to form a diazonium salt of the sulfanilic acid, dipping a carbon-containing bipolar fuel cell panel into the cooled first solution and heating the first solution at greater than 25 degrees C, so that the diazonium salt reacts with the carbon for binding a functional group to the carbon, in order to increase the hydrophilicity of the bipolar panel at the point of attachment of the functional group; and    (3) a process comprising providing an electrolyte solution that is formed from a diazonium salt, providing a working electrode, which exhibits a carbon-containing bipolar panel, providing a counter electrode and a reference electrode, immersing the working electrode, the counter electrode and the reference electrode into the electrolyte solution, applying a potential to the work electrode, so that a radical group of the diazonium salt reacts with the carbon for binding a functional group to the carbon to increase the hydrophilicity of the bipolar panel at the point of attachment of the functional group.    DESCRIPTION OF DRAWING(S) - The figure shows the bipolar composite fuel cell panel.    Bipolar panel (10)    Surface of the bipolar panel (12)    Webs (14)    Canals. (16)