2024-03-28T14:15:31Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/116322018-11-16T07:55:46Zcom_10261_84com_10261_5col_10261_337
00925njm 22002777a 4500
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Ruiz Ruiz, Vanesa
author
Blanco Rodríguez, Clara
author
Santamaría Ramírez, Ricardo
author
Juárez-Galán, J.M.
author
Sepúlveda-Escribano, A.
author
Rodríguez-Reinoso, F.
author
2008-04-15
Various microporous carbon molecular sieves are studied as active electrode material for supercapacitors in order to clarify the controversy about the accessibility of the electrolyte to the micropores. Cyclic voltammetry experiments were performed in electrolytes with different ion size. The results showed a clear ion sieving effect when the porosity of the carbon was similar to that of the ions of the electrolyte. Impedance spectroscopy was also useful to evidence diffusion restrictions of the ions into the pores. The results obtained in this study clearly demonstrate that in aqueous media very narrow micropores (0.5 nm) are still capable of forming the electrical double layer. Therefore, the majority of microporous carbons, with wider porosity, are perfectly suitable as active electrode materials for supercapacitors when aqueous electrolytes are used.
Microporous and Mesoporous Materials 110(2/3): 431-435 (2008)
1387-1811
http://hdl.handle.net/10261/11632
10.1016/j.micromeso.2007.06.027
Activated carbon
Molecular sieves
Electrochemical properties
Carbon molecular sieves as model active electrode materials in supercapacitors