Binder-less activated carbon electrode from gelam wood for use in supercapacitors

  • Nirwan Syarif Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Indonesia and Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University
  • Ivandini A. Tribidasari Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Indonesia
  • Widayanti Wibowo Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Indonesia

Abstract

This work focused on the relation between the porous structure of activated carbon and its capacitive properties. Three types of activated carbon monoliths were used as the electrodes in a half cell electrochemical system. One monolith was produced from activated carbon and considered to be a binder-less electrode. Two others were produced from acid and high pressure steam oxidized activated carbon. The micrographs clearly indicate that three electrodes have different porous structures. Both porosity and surface area of carbons increased due to the formation of grains during oxidation. This fact specified that an acid oxidized carbon monolith will have relatively higher capacitance compared to non-oxidized and steam oxidized monoliths. Maximum capacitance values for acid, steam oxidized and non-oxidized electrodes were 27.68, 2.23 and 1.20 F g-1, respectively.

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Published
19-04-2013
Section
Electrochemical Science