Effect of Resin Precursor and Porous Structure on the Performance of Electric Double Layer Capacitor (EDLC) Electrode

Abstract

Porous carbons were prepared from different chemical structure resins used as carbon precursors. Styrene-divinylbenzene resin without ion exchange group (MR-type (1)) and with different contents -SO₃ resins (MR-type (2), (3) and Gel-type) were used in this study. These resins were carbonized in N₂ stream and activated in CO₂ stream. Specific surface area and pore size distribution of the carbon materials depend on the physical and chemical structures of the raw materials. Micro porous carbon was prepared from high divinylbenzene content (100%) resin and micro and meso pore carbon from low divinylbenzene content (20%) with -SO₃ groups. Micro and meso bimodal had higher capacitance (70 F/g) than only micro pore carbon (43 F/g) used for EDLC carbon electrode.