Electrochemical Double-Layer capacitor based on Carbon@ covalent organic framework aerogels
EntityUAM. Departamento de Química Física Aplicada; UAM. Departamento de Química Inorgánica
10.1002/anie.202213106Angewandte Chemie International Edition (2022): e2022131
ISSN1433-7851 (print); 1521-3773 (online)
Funded byThis work has been supported by the Spanish MINECO (PID2019-106268GB-C32) and through the “María de Maeztu” Programme for Units of Excellence in R&D (CEX2018-000805)
SubjectsAerogels; Covalent Organic Frameworks; Flexible Electrodes; Porous Materials; Química
Rights© 2022 The Authors
Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
High energy demand results in comprehensive research of novel materials for energy sources and storage applications. Covalent organic frameworks (COFs) possess appropriate features such as long-range order, permanent porosity, tunable pore size, and ion diffusion pathways to be competitive electrode materials. Herein, we present a deep electrochemical study of two COF-aerogels shaped into flexible COF-electrodes (ECOFs) by a simple compression method to fabricate an electrochemical double-layer capacitor (EDLC). This energy storage system has considerable interest owing to its high-power density and long cycle life compared with batteries. Our result confirmed the outstanding behavior of ECOFs as EDLC devices with a capacity retention of almost 100 % after 10 000 charge/discharge cycles and, to our knowledge, the highest areal capacitance (9.55 mF cm−2) in aqueous electrolytes at higher scan rates (1000 mV s−1) for COFs. More importantly, the hierarchical porosity observed in the ECOFs increases ion transport, which permits a fast interface polarization (low τ0 values). The complete sheds light on using ECOFs as novel electrode material to fabricate EDLC devices
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Google Scholar:Martín Illán, Jesús Ángel - Sierra Trujillo, Laura - Ocón Esteban, Pilar - Zamora Abanades, Félix Juan
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