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Título
Charge storage capacity of electromethanogenic biocathodes
Autor
Facultad/Centro
Área de conocimiento
Título de la revista
Journal of Energy Storage
Número de la revista
109789
Cita Bibliográfica
Carrillo-Peña, D., Pelaz, G., Mateos, R., & Escapa, A. (2024). Charge storage capacity of electromethanogenic biocathodes. Journal of Energy Storage, 76, 109789. https://doi.org/https://doi.org/10.1016/j.est.2023.109789
Editorial
Elsevier
Fecha
2024-01
ISSN
2352-152X
Resumen
[EN] Methanogenic biocathodes (MB) can convert CO2 and electricity into methane. This feature, that allows them to potentially be used for long-term electrical energy storage, has aroused great interest during the past 10 years. MB can also operate as biological supercapacitors, a characteristic that can be exploited for short-term energy storage and that has received much less attention. In this study, we investigate the electrical charge storage capabilities of carbon-felt-based MB modified with graphene oxide. The charge-discharge experiments revealed that the potential of the electrode plays an important role during the discharging period: low potentials (−1.2 V vs Ag/AgCl) created an inrush of faradaic current that masked any capacitive current. At more positive potentials (−0.8 V vs Ag/AgCl), the biological electrodes were outperformed by the abiotic electrodes, and only when the potential was set at −1.0 V vs Ag/AgCl the graphene-modified biological electrode showed its superior charge storage capacity. Overall, results indicated that the graphene modification is crucial to obtain bioelectrodes with improved capacitance: untreated bioelectrodes showed a charge storage capacity inferior to that measured in the abiotic electrodes.
Materia
Palabras clave
Peer review
SI
ID proyecto
- info:eu-repo/grantAgreement/Ministerio de Ciencia, Innovación y Universidades/ TED2021-129687A-I00
URI
DOI
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