Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/343117
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Increasing the efficiency and cycle life of Na-O2 batteries based on graphene cathodes with heteroatom doping |
Autor: | Enterría González, Marina CSIC ORCID; Mysyk, R.; Medinilla, L.; Villar Rodil, Silvia CSIC ORCID ; Paredes Nachón, Juan Ignacio CSIC ORCID ; Rincón, I.; Fernández-Carretero, F. J.; Gómez, K.; del Amo, J. M.López; Ortiz-Vitoriano, N. | Palabras clave: | Sodium Cycling Graphene Metal-air batteries Parasitic reactions |
Tesauro UNESCO: | Green chemistry | Fecha de publicación: | 20-mar-2023 | Editor: | Elsevier | Citación: | Electrochimica Acta 445: 142056 (2023) | Resumen: | To overcome the challenges of Na-O2 batteries with respect to efficiency, capacity, and cycle life as well as to develop cheap, metal-free, and abundant electrocatalysts, we explored boron and nitrogen-functionalized graphene aerogels prepared by the hydrothermal self-assembly of graphene oxide with subsequent thermal reduction. The results showed an improve of both the cycling overpotential and the coulombic efficiency for the functionalized graphene aerogels. However, the nitrogen-containing cathode presented a shortened cycle life and decreased charging stability. The postmortem analysis of the full discharge, and the full discharge and charge cathodes demonstrated that nitrogen functionalization triggered the formation of solid parasitic products that passivate the cathode surface, thus resulting in a poorer electrochemical performance. By contrast, functionalization with boron-containing groups demonstrated to be a more promising strategy due to minimized parasitic products, leading to lower oxygen reduction and evolution overpotentials with a concomitantly enhanced cell efficiency vs. the undoped cathodes. This resulted in a cycle life of 70 cycles at a relatively high current density of 0.1 mA cm−2 with a capacity cut-off of 0.5 mAh cm−2. Our study underscores that functionalization with heteroatoms simultaneously alters multiple characteristics of graphene-based materials, including their chemistry, texture and morphology, which in turn presents a critical impact on the electrochemical response of the resultant Na-O2 cells. | Versión del editor: | https://doi.org/10.1016/j.electacta.2023.142056 | URI: | http://hdl.handle.net/10261/343117 | DOI: | 10.1016/j.electacta.2023.142056 | ISSN: | 0013-4686 |
Aparece en las colecciones: | (INCAR) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Increasing the efficiency_Enterria_2023.pdf | 8,78 MB | Adobe PDF | Visualizar/Abrir | |
Increasing the efficiency_Enterria_SI.pdf | Supporting Information | 1,18 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
3
checked on 23-abr-2024
WEB OF SCIENCETM
Citations
2
checked on 28-feb-2024
Page view(s)
15
checked on 01-may-2024
Download(s)
7
checked on 01-may-2024
Google ScholarTM
Check
Altmetric
Altmetric
Este item está licenciado bajo una Licencia Creative Commons