Graphene xerogel (GX) was synthesized through sol-gel polymerization of resorcinol (R) and formaldehyde (F) with graphene oxide (GO), followed by ambient pressure drying and pyrolysis. The addition of GO changed the gel structure, and the RF chains grew on the GO sheets because of the chemical interaction between RF and GO. The GX samples had higher adsorption capacity than carbon xerogle (CX) because of the super conductivity of graphene. GX-0.1 and GX-0.25 followed monolayer adsorption, whereas GX-0.5 exhibited a change from monolayer to multilayer with high equilibrium absorption capacity (257.69 mg/g NaCl at 1.2 V). (C) 2015 The Electrochemical Society. All rights reserved.