Electrochemical Double-Layer Capacitor based on Carbon@ Covalent Organic Framework Aerogels

被引:24
作者
Martin-Illan, Jesus A. [1 ]
Sierra, Laura [2 ]
Ocon, Pilar [2 ]
Zamora, Felix [1 ,3 ]
机构
[1] Univ Autonoma Madrid, Dept Quim Inorgan, Madrid 28049, Spain
[2] Univ Autonoma Madrid, Dept Quim Fis Aplicada, Madrid 28049, Spain
[3] Univ Autonoma Madrid, Inst Adv Res Chem Sci IAdChem, Madrid 28049, Spain
关键词
Aerogels; Covalent Organic Frameworks; Flexible Electrodes; Porous Materials; SUPERCAPACITIVE PERFORMANCE; ELECTRODES; GRAPHENE; CHALLENGES;
D O I
10.1002/anie.202213106
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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 tau(0) values). The complete sheds light on using ECOFs as novel electrode material to fabricate EDLC devices.
引用
收藏
页数:10
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