Abstract: There has been significant research interest in using coal as a precursor for supercapacitor electrode materials, owing to its abundant reserves and high carbon content.Pre-carbonization treatment serves to pyrolyze coal under an inert atmosphere, removing volatile matter to effectively tailor the precursor's initial pore structure, enabling extensive pore development during subsequent activation and leading to a capacitive carbon product of significantly increased specific surface area, pore volume, and superior electrochemical performance.A series of capacitive carbon materials were synthesized via a pre-carbonization followed by KOH activation, employing long-flame coal as the precursor.The effect of the pre-carbonization temperature on the pore structure of capacitive carbon was investigated, along with the electrochemical performance of the resulting materials.Research indicates that pre-carbonization produces cyclic aromatic hydrocarbons rich in edge defects. These defects act as active sites for KOH activation, thereby effectively facilitating the development of pore structures, particularly micropores, during activation.The pre-treated sample P-500 exhibited an ultra-high specific surface area of 3030 m2/g and a total pore volume of 1.415 cm3/g.The capacitive carbon demonstrated a specific capacitance of 311 F/g when tested at a current density of 0.5 A/g in 6 M KOH electrolyte;Even at a high current density of 5 A/g, a specific capacitance of 251 F/g was retained, representing a high capacitance retention of 80.53% and thus outstanding rate performance.The device showed high energy densities, ranging from 40.28 Wh/kg at a power density of 308.56 W/kg to 26.92 Wh/kg at 2684.85 W/kg, in 1 M Et?NBF?/PC electrolyte.