Jasni M.R.M.Deraman M.Suleman M.Zainuddin Z.Othman M.A.R.Chia C.H.Hashim M.A.2024-05-282024-05-282018947704710.1007/s11581-017-2283-72-s2.0-85030662480https://www.scopus.com/inward/record.uri?eid=2-s2.0-85030662480&doi=10.1007%2fs11581-017-2283-7&partnerID=40&md5=a161622e5c00fc6608dfaa6347ba23e0https://oarep.usim.edu.my/handle/123456789/9178Binderless electrodes of activated carbon monoliths (ACMs) and its composites with graphene are prepared by carbonization and activation of green monoliths consisting of self-adhesive carbon grains and 0�10�wt% KOH-treated graphene. Compared with ACMs, the optimized composite containing 6�wt% graphene exhibits more ordered micro-structures with increased crystallite height, and graphitic sp2 carbons (ID/IG�=�0.49 vs. 0.91) along with enhanced porosity; as revealed by X-ray diffraction, Raman, and N2 adsorption-desorption studies. These modifications lead to increased electrical conductivity (13 vs. 9�S�cm?1) through improved interconnections of carbon particles by graphene, and surface area�~�(800 vs. 456�m2�g?1) due to increased inter-particle spacing. Further, contrary to ACMs, the composite electrodes can offer faster delivery of energy in almost 50% less response time (5 vs. 8�s) due to reduced equivalent series resistance (1.67 vs. 2.65�?) and charge transfer resistance (0.55 vs. 1.33�?). � 2017, Springer-Verlag GmbH Germany.en-USActivated carbon monolithsAqueous electrolyteBinderless electrodesEnergy storageGrapheneGreen monolithsSelf-adhesive carbon grainsActivated carbonBinsCarbonizationCharge transferChemical activationElectric resistanceElectrodesElectrolytesEnergy storagePotashPotassium compoundsSupercapacitorX ray diffractionActivated carbon monolithsAqueous electrolyteBinderlessGreen monolithsSelf-adhesiveGrapheneArticle11951210244