Iron salicylaldehydate conjugated metal–organic framework for quasi solid-state supercapacitor
Conjugated metal–organic frameworks (c-MOFs) are potential candidates for excellent electro and photochemical activities such as energy storage and catalysis. However, the poor chemical stability of c-MOFs obstructs them from the practical utilities in acid or base-functioned energy storage devices....
| Autores: | , , , , , , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/383680 |
| Acesso em linha: | http://hdl.handle.net/10261/383680 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85197547790&doi=10.1016%2fj.cej.2024.153589&partnerID=40&md5=350341e7f47831a3af74d8c2b0d12105 |
| Access Level: | acceso abierto |
| Palavra-chave: | Chemical stability conjugated MOFs Energy storage Green synthesis Metal–organic framework |
| Resumo: | Conjugated metal–organic frameworks (c-MOFs) are potential candidates for excellent electro and photochemical activities such as energy storage and catalysis. However, the poor chemical stability of c-MOFs obstructs them from the practical utilities in acid or base-functioned energy storage devices. Herein, we have introduced a novel iron-based salicylaldehydate 3D-c-MOF (Fe-Tp) with high chemical stability in strong acid environments. The robust coordination bond between iron and C3 symmetric salicylaldehyde organic pockets results in a doubly interpenetrated 3D framework with ultra-high chemical stability. The biphasic doubly interpenetrated structure of Fe-Tp was elucidated using theoretical modeling with the assistance of single-crystal electron diffraction analysis. The Fe-Tp showed chemical stability even in 10 M H2SO4 for 24 h. Moreover, we have investigated the dynamic charge storages in Fe-Tp in varying concentrations of acid electrolyte (122 F g−1 at 0.1 M H2SO4 to 400 F g−1 at 5 M H2SO4 at 0.1 A/g). The Fe-Tp-based flexible quasi-solid-state supercapacitor was fabricated using proton-loaded PVA electrolyte gel. It showed an excellent electrode capacitance of 106.25 mF cm−2 (at 0.25 mA cm−2) with remarkable cyclic stability (36,000 cycles with 80 % capacitance retention at 5 mA cm−2). © 2024 The Authors |
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