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Supercapacitive Behavior of Two Glucose-Derived Microporous Carbons: Direct Pyrolysis versus Hydrothermal Carbonization

AutorSevilla Solís, Marta ; Linghui, Yu; Ovín Ania, María Concepción ; Titirici, María-Magdalena
Palabras claveCarbon
Energy storage
Hydrothermal synthesis
Fecha de publicación9-sep-2014
CitaciónChemElectroChem 1(12): 2138–2145 (2014)
ResumenThe physical and chemical characteristics of activated carbons produced from glucose and hydrothermally carbonized glucose are compared for the first time, as well as their performance as electrodes in supercapacitors with aqueous electrolyte (H2SO4). Both KOH-activated carbons exhibit similar textural properties, with Brunauer–Emmett–Teller surface areas of ≈1400–1500 m2 g−1 and a pore volume of ≈0.70 cm3 g−1, with the pore size distribution centered in the micropore range. When tested as supercapacitor electrodes, the activated carbon produced from hydrothermally carbonized glucose exhibits a superior rate capability, owing to lower equivalent distributed resistance (being able to work at an ultrahigh discharge current of 90 A g−1), as well as higher specific capacitance (≈240 F g−1 vs. ≈220 F g−1 for the glucose-derived activated carbon at 0.1 A g−1). Both supercapacitors have excellent robustness, even for a large cell voltage of 1.2 V in 1 M H2SO4.
DescripciónThis is the accepted version of the following article: Sevilla, M., Yu, L., Ania, C. O. and Titirici, M.-M. (2014), Supercapacitive Behavior of Two Glucose-Derived Microporous Carbons: Direct Pyrolysis versus Hydrothermal Carbonization. CHEMELECTROCHEM, 1: 2138–2145. doi: 10.1002/celc.201402233, which has been published in final form at http://dx.doi.org/10.1002/celc.201402233. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy
Versión del editorhttp://dx.doi.org/10.1002/celc.201402233
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