Pognon et al. have previously shown that anthraquinone-grafted carbons can be synthesized by adding a diazonium radical initiator and 2-aminoanthraquinone (2-AAQ) to a porous carbon material. This study found that the anthraquinone loading on the surface could be changed using a variety of concentrations and mixing times. Our synthesis adapted the conditions that showed the highest anthraquinone loading from the literature protocol by mixing 2-AAQ and CMK-3 together for 24 hours prior to the addition of a radical initiator, allowing time for the 2-AAQ to diffuse into the inner pores in the carbon network, promoting an even distribution and reducing side reactions such as polymerization. For a microporous carbon, the diffusion of anthraquinone into the carbon network can block some pores, leading to a loss of surface area and a lower quinone loading. Pore blockages also affect the electrochemical behaviour, as it limits ionic transport of the electrolyte to the charged surface, thus leading to a loss in electrochemical capacity. This can be overcome by using mesoporous carbons with pore sizes between 2 and 10 nm to facilitate electrolyte accessibility. As such, CMK-3, a mesoporous carbon with a pore diameter > 4 nm, was ultimately chosen for electrochemical quinone grafting.