Role of surface chemistry on electric double layer capacitance of carbon materials

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Title: Role of surface chemistry on electric double layer capacitance of carbon materials
Authors: Bleda Martínez, María Jesús | Maciá Agulló, Juan Antonio | Lozano Castelló, Dolores | Morallon, Emilia | Cazorla-Amorós, Diego | Linares-Solano, Angel
Research Group/s: Electrocatálisis y Electroquímica de Polímeros
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica
Keywords: Activated carbon | Temperature programmed desorption | Electrochemical properties | Electrical properties | Surface oxygen complexes
Knowledge Area: Química Física | Ciencia de Materiales
Date Created: 16-May-2005
Issue Date: 14-Jul-2005
Publisher: Elsevier
Citation: BLEDA MARTÍNEZ, María Jesús, et al. "Role of surface chemistry on electric double layer capacitance of carbon materials". Carbon. Vol. 43, Issue 13 (Nov. 2005). ISSN 0008-6223, pp. 2677-2684
Abstract: A large number of porous carbon materials with different properties in terms of porosity, surface chemistry and electrical conductivity, were prepared and systematically studied as electric double layer capacitors in aqueous medium with H2SO4 as electrolyte. The precursors used are an anthracite, general purpose carbon fibres and high performance carbon fibres, which were activated by KOH, NaOH, CO2 and steam at different conditions. Among all of them, an activated anthracite with a BET surface area close to 1500 m2/g, presents the best performance, reaching a value of 320 F/g, using a three-electrode system. The results obtained for all the samples, agree with the well-known relationship between capacitance and porosity, and show that the CO-type oxygen groups have a positive contribution to the capacitance. A very good correlation between the specific capacitance and this type of oxygen groups has been found.
Sponsor: The authors thank MEC for financial support (Project PPQ2003-03884).
ISSN: 0008-6223
DOI: 10.1016/j.carbon.2005.05.027
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version:
Appears in Collections:INV - GEPE - Artículos de Revistas

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