β-Ketoenamine-linked covalent organic frameworks synthesized via gel-to-gel monomer exchange reaction: From aerogel monoliths to electrodes for supercapacitors
Covalent organic frameworks (COFs) possess intrinsic nanoscale pores,limiting mass transport and impacting their utility in many applications, suchas catalysis, supercapacitors, and gas storage, demanding efficient diffusionthroughout the material. Hierarchical porous structures, integrating largermacr...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/712856 |
| Acceso en línea: | http://hdl.handle.net/10486/712856 https://dx.doi.org/10.1002/adfm.202403567 |
| Access Level: | acceso abierto |
| Palabra clave: | Aerogels Covalent Organic Frameworks Functional COF Composites Porous Materials Ultralight Monolithic Aerogels Química |
| Sumario: | Covalent organic frameworks (COFs) possess intrinsic nanoscale pores,limiting mass transport and impacting their utility in many applications, suchas catalysis, supercapacitors, and gas storage, demanding efficient diffusionthroughout the material. Hierarchical porous structures, integrating largermacropores with inherent micro-/meso-pores, facilitate rapid mass transport.Recently, the fabrication of aerogel monoliths is reported exclusively fromimine-linked COFs, offering flexibility in aerogel composition. However,challenges in synthesizing robust -ketoenamine-based COFs withcomparable surface areas prompted innovative synthetic approaches.Leveraging the dynamic nature of COF bonds, in this work efficient monomerexchange from imine to partially -ketoenamine-linked COFs within the gelphase is demonstrated. These aerogels can be transformed into electrodesusing the compression technique. The new flexible electrodes-based-ketoenamine-linked COF composites with C super P exhibit superiordurability and redox activity. Through supercapacitor assembly, the-ketoenamine-linked COF electrodes outperform their imine-basedcounterparts, showcasing enhanced capacitance (88 mF cm−2 ) and stability athigh current densities (2.0 mA cm−2 ). These findings underscore the promiseof -ketoenamine-linked COFs for pseudocapacitor energy storageapplications |
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