Abstract: Nanoporous and mesoporous carbon materials are fabricated in a pyrolysis process in which a starting mixture including a carbonizing polymer and a pyrolyzing polymer are employed. In one instance, the carbonizing polymer and pyrolyzing polymer are joined together in the form of a block copolymer. In another instance, the carbonizing polymer is a polyfurfuryl alcohol and the pyrolyzing polymer is polyethylene glycol diacid. These two polymer materials are mixed together and not copolymerized. The pore structure of the material may be controlled by controlling the molecular weight of various of the polymer components.