Electrochemical performance of N‐doped superporous activated carbons in ionic liquid‐based electrolytes
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Título: | Electrochemical performance of N‐doped superporous activated carbons in ionic liquid‐based electrolytes |
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Autor/es: | Mostazo-López, María José | Krummacher, Jakob | Balducci, Andrea | Morallon, Emilia | Cazorla-Amorós, Diego |
Grupo/s de investigación o GITE: | Materiales Carbonosos y Medio Ambiente | Electrocatálisis y Electroquímica de Polímeros |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Supercapacitors | Nitrogen functionalization | Superporous activated carbons | Ionic liquid | Electrochemical stability |
Área/s de conocimiento: | Química Inorgánica | Química Física |
Fecha de publicación: | 1-feb-2021 |
Editor: | Elsevier |
Cita bibliográfica: | Electrochimica Acta. 2021, 368: 137590. https://doi.org/10.1016/j.electacta.2020.137590 |
Resumen: | The electrochemical performance of nitrogen-doped and non-doped superporous activated carbons as electrodes for supercapacitors was assessed in organic and ionic liquid-based electrolytes. The nitrogen functionalization was carried out through post-modification treatments at mild conditions to produce N-doped activated carbons that preserve the microporosity of the pristine carbon material. The electrodes based on these materials provide large capacitance values (up to 150–180 F/g) in both 1 M Pyr14TFSI/PC and 1 M Pyr14BF4/PC due to their tailored porous texture, given by their well-developed microporosity and low mesopore volume. The electrochemical double layer capacitors based on these materials displayed outstanding capacitance (37–40 F/g and 14 F/cm3) and energy values (44–48 Wh/kg and 16–17 Wh/L). The nitrogen-doped activated carbons evidence high stability at positive and negative polarization potentials due the presence of specific N functionalities. The results prove that surface chemistry of carbon materials plays a key role on their degradation under high operation voltage conditions. The durability of the devices can be improved by doping carbon electrodes with selected nitrogen groups, such as nitrogen heterocycles and amine-like surface functionalities. |
Patrocinador/es: | The authors thank MICINN, FEDER (RTI2018-095291-B-I00 and ENE2017-90932-REDT). MJML acknowledges financial support through VALi+d grant (ACIF/2015/374) and mobility grant (BEFPI/2017/036). |
URI: | http://hdl.handle.net/10045/112918 |
ISSN: | 0013-4686 (Print) | 1873-3859 (Online) |
DOI: | 10.1016/j.electacta.2020.137590 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2020 Elsevier Ltd. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.electacta.2020.137590 |
Aparece en las colecciones: | INV - MCMA - Artículos de Revistas INV - GEPE - Artículos de Revistas |
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Mostazo-Lopez_etal_2021_ElectrochimActa_final.pdf | Versión final (acceso restringido) | 1,35 MB | Adobe PDF | Abrir Solicitar una copia |
Mostazo-Lopez_etal_2021_ElectrochimActa_preprint.pdf | Preprint (acceso abierto) | 3,43 MB | Adobe PDF | Abrir Vista previa |
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