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Página principal > Artículos > Artículos publicados > Ultrathin hierarchical porous carbon nanosheets for high-performance supercapacitors and redox electrolyte energy storage |
Fecha: | 2018 |
Resumen: | The design of advanced high-energy-density supercapacitors requires the design of unique materials that combine hierarchical nanoporous structures with high surface area to facilitate ion transport and excellent electrolyte permeability. Here, shape-controlled 2D nanoporous carbon sheets (NPSs) with graphitic wall structure through the pyrolysis of metal-organic frameworks (MOFs) are developed. As a proof-of-concept application, the obtained NPSs are used as the electrode material for a supercapacitor. The carbon-sheet-based symmetric cell shows an ultrahigh Brunauer-Emmett-Teller (BET)-area-normalized capacitance of 21. 4 µF cm (233 F g), exceeding other carbon-based supercapacitors. The addition of potassium iodide as redox-active species in a sulfuric acid (supporting electrolyte) leads to the ground-breaking enhancement in the energy density up to 90 Wh kg, which is higher than commercial aqueous rechargeable batteries, maintaining its superior power density. Thus, the new material provides a double profits strategy such as battery-level energy and capacitor-level power density. |
Ayudas: | Ministerio de Economía y Competitividad SEV-2013-0295 Ministerio de Economía y Competitividad MAT2015-68394-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1505 |
Nota: | ICN2 is funding from the CERCA Programme/Generalitat de Catalunya |
Derechos: | Tots els drets reservats. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió sotmesa a revisió |
Materia: | Graphitic nanoporous carbon sheets ; Metal-organic frameworks (MOFs) ; Morphology control ; Supercapacitors ; 2D materials |
Publicado en: | Advanced materials, Vol. 30, issue 15 (April 2018) , art. 1705789, ISSN 1521-4095 |
Preprint 21 p, 895.8 KB |