Study on synthesis of low surface area activated carbons using multi-step activation for use in electric double layer capacitor

Kwang Chul Roh, Jin Bae Park, Chul Tae Lee, Chul Wan Park

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Low surface area activated carbon derived from compact mesocarbon microbeads (MCMB2010) was synthesized using a lower amount of KOH (1:1 weight ratio of KOH to MCMB) than normally used followed by electrochemical activation. The specific capacitance of the activated carbon heat treated at between 650 and 900 °C was increased up to ca. 118 F/cc (half cell base, 750 °C-heat treated sample) after electrochemical activation, even with a low surface area carbon (<50 m2/g). The morphology of low surface area activated MCMB determined by FE-SEM showed a smooth carbon surface without pores. The charge/discharge profiles were similar to those of conventional activated carbon. The specific capacitance of the activated samples increased with increasing heat treatment up to 850 °C after electrochemical activation. However, it was lower for the sample heat treated at 900 °C.

Original languageEnglish
Pages (from-to)247-251
Number of pages5
JournalJournal of Industrial and Engineering Chemistry
Issue number2
Publication statusPublished - 2008 Mar 1


All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

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