Activated carbons from KOH-activation of argan (Argania spinosa) seed shells as supercapacitor electrodes

Abdelhakim Elmouwahidi, Zulamita Zapata-Benabithe, Francisco Carrasco-Marín, Carlos Moreno-Castilla

    Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

    305 Citas (Scopus)


    Activated carbons were prepared by KOH-activation of argan seed shells (ASS). The activated carbon with the largest surface area and most developed porosity was superficially treated to introduce oxygen and nitrogen functionalities. Activated carbons with a surface area of around 2100m 2/g were obtained. Electrochemical measurements were carried out with a three-electrode cell using 1M H 2SO 4 as electrolyte and Ag/AgCl as reference electrode. The O-rich activated carbon showed the lowest capacitance (259F/g at 125mA/g) and the lowest capacity retention (52% at 1A/g), due to surface carboxyl groups hindering electrolyte diffusion into the pores. Conversely, the N-rich activated carbon showed the highest capacitance (355F/g at 125mA/g) with the highest retention (93% at 1A/g), due to its well-developed micro-mesoporosity and the pseudocapacitance effects of N functionalities. This capacitance performance was among the highest reported for other activated carbons from a large variety of biomass precursors.

    Idioma originalInglés
    Páginas (desde-hasta)185-190
    Número de páginas6
    PublicaciónBioresource Technology
    EstadoPublicada - may. 2012


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