High frequency response of adenine-derived carbon in aqueous electrochemical capacitor

Piwek, J. ; Slesinski, A. ; Fic, K. ; Aina, S. (Universidad de Zaragoza) ; Vizintin, A. ; Tratnik, B. ; Tchernychova, E. ; Lobera, M. P. (Universidad de Zaragoza) ; Bernechea, M. ; Dominko, R. ; Frackowiak, E.

Resumen: 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.

Idioma: Inglés

DOI: 10.1016/j.electacta.2022.140649

Año: 2022

Publicado en: Electrochimica Acta 424 (2022), 140649 [11 pp.]
ISSN: 0013-4686

Factor impacto JCR: 6.6 (2022)

Categ. JCR: ELECTROCHEMISTRY rank: 8 / 30 = 0.267 (2022) - Q2 - T1

Factor impacto CITESCORE: 12.8 - Chemistry (Q1) - Chemical Engineering (Q1)

Factor impacto SCIMAGO: 1.264 - Electrochemistry (Q1) - Chemical Engineering (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MICIN PCI2019–103637

Tipo y forma: Article (Published version)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)