<i>Operando</i> Raman and <i>ex situ</i> characterization of an iron-based conductive MOF as a negative electrode in Li-ion batteries
Ciria-Ramos, Isabel (Universidad de Zaragoza) ; Neale, Alex R. ; Hardwick, Laurence J. ; Juarez-Perez, Emilio J. ; Gascón, Ignacio (Universidad de Zaragoza) ; Haro, Marta (Universidad de Zaragoza)
Resumen: An iron-based electrically conductive metal–organic framework (MOF), Fe-HHTP, formed by the coordination of Fe cations and the organic ligand HHTP (2,3,6,7,10,11-hexahydroxytriphenylene), has been synthesized, characterized, and explored as a potential negative electrode for lithium-ion batteries (LIBs). Galvanostatic cycling experiments, with a lower cut-off voltage of 0.1 V vs. Li/Li+, reveal that Fe-HHTP undergoes a significant activation process, resulting in an increase in specific capacity up to 1142 mAh g−1 after ∼220 cycles at a current of 355 mA g−1. Operando Raman spectroscopy during the first lithiation, complemented by ex situ techniques at different cycling stages, demonstrates that both the organic ligands and metal centers actively contribute to Li+ storage. Initially, lithiation occurs primarily at the MOF boundaries, while continuous cycling induces a structural transformation that allows greater accessibility to the inner regions of Fe-HHTP. These results provide a better understanding of the electrochemical and structural behavior of pristine MOFs that allow tailoring their properties for direct application in energy storage devices without the need for high-temperature processes.
Idioma: Inglés
DOI: 10.1039/d5dt00893j
Año: 2025
Publicado en: Dalton Transactions (2025), [12 pp.]
ISSN: 1477-9226
Financiación: info:eu-repo/grantAgreement/ES/DGA/E31-23R
Financiación: info:eu-repo/grantAgreement/ES/MCIU/CNS2023-14197
Financiación: info:eu-repo/grantAgreement/ES/MCIU/CPP2022-009766
Financiación: info:eu-repo/grantAgreement/ES/MCIU/PID2022-140516OB-I00
Financiación: info:eu-repo/grantAgreement/ES/MICIU/CEX2023-001286-S
Tipo y forma: Article (Published version)
Área (Departamento): Área Química Física (Dpto. Química Física)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
Exportado de SIDERAL (2025-10-17-14:17:56)
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Idioma: Inglés
DOI: 10.1039/d5dt00893j
Año: 2025
Publicado en: Dalton Transactions (2025), [12 pp.]
ISSN: 1477-9226
Financiación: info:eu-repo/grantAgreement/ES/DGA/E31-23R
Financiación: info:eu-repo/grantAgreement/ES/MCIU/CNS2023-14197
Financiación: info:eu-repo/grantAgreement/ES/MCIU/CPP2022-009766
Financiación: info:eu-repo/grantAgreement/ES/MCIU/PID2022-140516OB-I00
Financiación: info:eu-repo/grantAgreement/ES/MICIU/CEX2023-001286-S
Tipo y forma: Article (Published version)
Área (Departamento): Área Química Física (Dpto. Química Física)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2025-10-17-14:17:56)
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Record created 2025-06-12, last modified 2025-10-17