131677 20240319081023.0 doi 10.1016/j.electacta.2022.140649 sideral 129664 ART-2022-129664 eng Piwek, J. High frequency response of adenine-derived carbon in aqueous electrochemical capacitor 2022 Access copy available to the general public Unrestricted Electrochemical capacitors are attractive power sources, especially when they are able to operate at high frequency (high current regime). In order to meet this requirement their constituents should be made of high conductivity materials with a suitable porosity. In this study, enhanced power and simultaneously high capacitance (120 F g-1 at 1 Hz or 10 A g-1) electrode material obtained from carbonized adenine precursor is presented. A micro/mesoporous character of the carbon with optimal pore size ratio and high surface area was proven by the physicochemical characterization. The beneficial pore structure and morphology resembling highly conductive carbon black, together with a significant nitrogen content (5.5%) allow for high frequency response of aqueous capacitor to be obtained. The carbon/carbon symmetric capacitor (in 1 mol L-1 Li2SO4) has been tested to the voltage of 1.5 V. The cyclic voltammetry indicates a good electrochemical response even at high scan rate (50 mV s-1). The cyclability of the capacitor is comparable to the one operating with commercial carbon (YP50F). The adenine-based capacitor is especially favourable for stationary applications requiring high power. info:eu-repo/grantAgreement/ES/MICIN PCI2019–103637 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 6.6 2022 ELECTROCHEMISTRY 8 / 30 = 0.267 2022 Q2 T1 1.264 2022 Electrochemistry 2022 Q1 Chemical Engineering (miscellaneous) 2022 Q1 12.8 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Slesinski, A. Fic, K. Aina, S. Universidad de Zaragoza (orcid)0000-0002-2866-9369 Vizintin, A. Tratnik, B. Tchernychova, E. Lobera, M. P. Universidad de Zaragoza (orcid)0000-0002-2436-1041 Bernechea, M. (orcid)0000-0003-2800-6845 Dominko, R. Frackowiak, E. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 424 (2022), 140649 [11 pp.] Electrochim. acta Electrochimica Acta 0013-4686 5760574 http://zaguan.unizar.es/record/131677/files/texto_completo.pdf Versión publicada 2316367 http://zaguan.unizar.es/record/131677/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:131677 articulos driver 2024-03-18-16:27:23 ARTICLE