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Título: | Reduced graphite oxide in supercapacitor electrodes |
Autor: | Lobato Ortega, Belén CSIC ORCID; Vretenár, Viliam; Kotrusz, Peter; Hulman, Martin; Álvarez Centeno, Teresa CSIC ORCID | Palabras clave: | Supercapacitor Reduced graphite oxide Graphene material Electrode surface |
Fecha de publicación: | ene-2015 | Editor: | Elsevier | Citación: | Journal of Colloid and Interface Science 446: 203-207 (2015) | Resumen: | The current energy needs have put the focus on highly efficient energy storage systems such as supercapacitors. At present, much attention focuses on graphene-like materials as promising supercapacitor electrodes. Here we show that reduced graphite oxide offers a very interesting potential. Materials obtained by oxidation of natural graphite and subsequent sonication and reduction by hydrazine achieve specific capacitances as high as 170 F/g in H2SO4 and 84 F/g in (C2H5)4NBF4/acetonitrile. Although the particle size of the raw graphite has no significant effect on the physico-chemical characteristics of the reduced materials, that exfoliated from smaller particles (<75 μm) result more advantageous for the release of the stored electrical energy. This effect is particularly evident in the aqueous electrolyte. Graphene-like materials may suffer from a drop in their specific surface area upon fabrication of electrodes with features of the existing commercial devices. This should be taken into account for a reliable interpretation of their performance in supercapacitors. | Versión del editor: | http://dx.doi.org/10.1016/j.jcis.2015.01.037 | URI: | http://hdl.handle.net/10261/111609 | DOI: | 10.1016/j.jcis.2015.01.037 | ISSN: | 0021-9797 | E-ISSN: | 1095-7103 |
Aparece en las colecciones: | (INCAR) Artículos |
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Reduced graphite_Lobato.pdf | 180,16 kB | Adobe PDF | Visualizar/Abrir |
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