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Título: | Surface-related capacitance of microporous carbons in aqueous and organic electrolytes |
Autor: | Álvarez Centeno, Teresa CSIC ORCID ; Stoeckli, Fritz | Palabras clave: | Electrochemical capacitor Carbon Microporosity Surface functionalities Dielectric constant |
Fecha de publicación: | ago-2011 | Editor: | Elsevier | Citación: | Electrochimica Acta 56(21): 7334-7339 (2011) | Resumen: | This paper examines the surface-related capacitance C/S of carbons with average micropore widths between 0.73 and 1.80 nm, using 1–2 M H2SO4, 6 M KOH and 1 M (C2H5)4NBF4 in acetonitrile as electrolytes. Following corrections for pseudocapacitance effects for the aqueous electrolytes and the use of an average surface area suggested by independent techniques, different from the BET area, it appears that C/S is practically independent of the micropore width. The analysis of the data with the help of recent models suggests that the dielectric constants ɛr of the different electrolytes may decrease with the pore size. It is surprising that the coexistence of two sets of values for the surface area of microporous carbons and its consequence on C/S have not received more attention in the past. | Versión del editor: | http://dx.doi.org/10.1016/j.electacta.2011.06.040 | URI: | http://hdl.handle.net/10261/100230 | DOI: | 10.1016/j.electacta.2011.06.040 | ISSN: | 0013-4686 |
Aparece en las colecciones: | (INCAR) Artículos |
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Surface-related_Centeno.pdf | 115,7 kB | Adobe PDF | Visualizar/Abrir |
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