Faculté des sciences

Cherry stones as precursor of activated carbons for supercapacitors

Olivares-Marín, M. ; Fernández, J. A. ; Lázaro, M. J. ; Fernández-González, C. ; Macías-García, A. ; Gómez-Serrano, V. ; Stoeckli, Fritz ; Centeno, Teresa A.

In: Materials Chemistry and Physics, 2009, vol. 114, no. 1, p. 223-227

It is shown that cherry stones-wastes can be recycled as activated carbons for electrode material in supercapacitors. KOH-activation of this precursor at 800–900 °C is an efficient process to obtain carbons with large specific surface areas (1100–1300 m2 g−1), average pore sizes around 0.9–1.3 nm, which makes them accessible to electrolyte ions, and conductivities... Plus

Ajouter à la liste personnelle
    Summary
    It is shown that cherry stones-wastes can be recycled as activated carbons for electrode material in supercapacitors. KOH-activation of this precursor at 800–900 °C is an efficient process to obtain carbons with large specific surface areas (1100–1300 m2 g−1), average pore sizes around 0.9–1.3 nm, which makes them accessible to electrolyte ions, and conductivities between 1 and 2 S cm−1. These features lead to capacitances at low current density as high as 230 F g−1 in 2 M H2SO4 aqueous electrolyte and 120 F g−1 in the aprotic medium 1 M (C2H5)4NBF4/acetonitrile. Furthermore, high performance is also achieved at high current densities, which means that this type of materials competes well with commercial carbons used at present in supercapacitors.