Sulphur-modified porous carbon material, method for preparing same and uses thereof for storing and redelivering power

The process comprises drying a gel comprising hydrophilic polymer of polyhydroxybenzene/formaldehyde type and a nitrogen latex including nitrile rubbers, pyrolyzing a sulfur modified monolithic porous carbon material, impregnating the material with strong sulfur acid having a pH of less than 1 and a concentration of 1 M, and heat treating the material at a temperature of 300-400[deg] C for = 2 hours. The drying step is carried out by solvent exchange and drying in supercritical carbon dioxide medium or by convective drying in gas flow or in climatic chamber having controlled humidity levels. The process comprises drying a gel comprising hydrophilic polymer of polyhydroxybenzene/formaldehyde type and a nitrogen latex including nitrile rubbers, pyrolyzing a sulfur modified monolithic porous carbon material, impregnating the material with strong sulfur acid having a pH of less than 1 and a concentration of 1 M, and heat treating the material at a temperature of 300-400[deg] C for = 2 hours. The drying step is carried out by solvent exchange and drying in supercritical carbon dioxide medium, by convective drying in gas flow or in climatic chamber having controlled humidity levels or by lyophilization. The pyrolyzing step is carried out under nitrogen atmosphere using protocols including a slow rise in temperature at a rate of 1-5[deg] C/min to a temperature of 400-500[deg] C, where the temperature is maintained for a duration of 1 hour, followed by a faster rise in temperature at a rate of 5-20[deg] C/min to a temperature of 800-1500[deg] C, where the temperature is maintained for a duration of 2 hours. An independent claim is included for a sulfur modified monolithic porous carbon material.