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Cherry stones as precursor of activated carbons for supercapacitors

AuthorsOlivares-Marín, M.; Fernández López, José Antonio ; Lázaro Elorri, María Jesús ; Fernández-González, C.; Macías-García, A.; Gómez-Serrano, V.; Stoeckli, F.; Álvarez Centeno, Teresa
KeywordsMicroporous materials
Electrochemical properties
Issue Date15-Mar-2009
CitationMaterials Chemistry and Physics 114(1): 323-327 (2009)
AbstractIt 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.
Description5 pages, 4 figures, 3 tables.-- Available online Oct 31, 2008.
Publisher version (URL)http://dx.doi.org/10.1016/j.matchemphys.2008.09.010
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(INCAR) Artículos
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