Electrochemical double-layer capacitor performance of novel carbons derived from SAPO zeolite templates

Mesoporous carbons have been synthesized using template method by polymerizing and then carbonizing carbon precursor of sucrose accommodated in novel templates of SAPO-11 and SAPO-34 after the removal of templates with NaOH solution (50 vol.% ethanol–50 vol.% H2O). High surface areas and excellent eletrochemical properties of the mesoporous carbons were identified by the Brunauer–Emmett–Teller method, cyclic voltammetry, electrochemical impedance spectroscopy and constant current charge–discharge tests. The surface areas of the sample carbons are the range of 950–975 m2/g, with a narrow pore size between 3.8 and 11.0 nm. The sample carbon derived from SAPO-11 exhibits better electrochemical performance over the one from SAPO-34, with the specific capacitance of 154.8, 113.5 F/g them, respectively, measured in 1 M KOH aqueous solution at the loading current density of 0.25 A/g.

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► Novel mesoporous carbons have been fabricated based SAPO zeolites as templates.
► The surface areas of sample carbons reach 950–975 m2/g.
► Carbon C-11 has the higher specific capacitance, better cycling stability and lifetime.
► Carbon C-11 is a promising carbon material for supercapacitor application.