Functionalized graphene contained flourish oxygen functional groups through thermal exfoliation of graphite oxide at low temperature along with ambient pressure. We found that complete oxidized graphite can successfully exfoliate at a low temperature of ~200? at ambient pressure. Functionalized graphene prepared by this method retained fractional oxygen functional groups by analysis of FTIR. The electrochemical properties of supercapacitor electrodes was studied by cyclic voltammetry and galvanostatic charge/discharge methods. The results showed that supercapacitors based on as-prepared functionalized graphene had great electrochemical performance. The maximum specific capacitance of functionalized graphene was 315F/g at the charge/discharge current density of 100mA/g using 1M KOH electrolyte, as well as a high charge/discharge efficiency of 97%.

Supercapacitor based on graphite oxide prepared by thermal exfoliation

244th National Meeting (2012)

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