Rapid preparation of nitrogen-doped carbon and its use in electrochemical capacitors

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  • 窒素含有炭素の短時間焼成とそのEDLC特性
  • チッソ ガンユウ タンソ ノ タンジカン ショウセイ ト ソノ EDLC トクセイ

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Abstract

<p>The nitrogen-doping of carbon materials has attracted attention as a technique for improving their electrical and chemical properties. In this study, nitrogen-doped porous carbon was prepared using penta-ethylene-hexa-amine (PEHA) as both carbon and nitrogen sources, and FeCl3 as a catalyst. The use of FeCl3 enabled carbonization and graphitization at relatively low temperatures within a short time of 3 min. It was revealed that the crystallinity of the carbon material obtained by heat treatment at 900 °C was relatively high, based on the XRD analysis. Its specific surface area was 280 m2/g and the nitrogen content was 4.2 at. %. The electrtic double-layer capacitance per unit mass of the obtained carbon in a sulfuric acid electrolyte solution was 190 F/g at a current density of 50 mA/g, retaining a high value of 175 F/g even at a high current density of 1000 mA/g. In addition, this carbon exhibited a high areal specific capacitance of 0.68 F/m2. This superior performance, showing a large capacitance despite the small surface area, could be due to the nitrogen-doping. This carbon material would be the most suitable material for the electrode of an electric double layer capacitor (EDLC) because of its high conductivity and crystallinity, and the high nitrogen content that induces a large pseudo-capacitance.</p>

Journal

  • TANSO

    TANSO 2020 (294), 113-121, 2020-09-01

    THE CARBON SOCIETY OF JAPAN

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