Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 135, Issue 45, Pages 16821-16824Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja409421d
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Funding
- NSF in the form of CAREER [CHE-1056657]
- NSF GRFP [DGE-1144153]
- Sloan Research Fellowship
- Camille and Henry Dreyfus Foundation's Camille Dreyfus Teacher-Scholar Award
- NSF [DMR-1120296]
- DOE [DE-FG02-87ER45298]
- Energy Materials Center at Cornell, an Energy Frontier Research Center
- DOE Office of Basic Energy Sciences [DE-SC0001086]
- Cornell High Energy Synchrotron Source
- IGERT Fellowship [DGE-0903653]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1056657] Funding Source: National Science Foundation
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Two-dimensional covalent organic frameworks (2D COFs) are candidate materials for charge storage devices because of their micro- or mesoporosity, high surface area, and ability to predictably organize redox-active groups. The limited chemical and oxidative stability of established COF linkages, such as boroxines and boronate esters, precludes these applications, and no 2D COF has demonstrated reversible redox behavior. Here we describe a beta-ketoenamine-linked 2D COF that exhibits reversible electrochemical processes of its anthraquinone subunits, excellent chemical stability to a strongly acidic electrolyte, and one of the highest surface areas of the imine- or enamine-linked 2D COFs. Electrodes modified with the redox-active COF show higher capacitance than those modified with a similar non-redox-active COF, even after 5000 charge discharge cycles. These findings demonstrate the promise of using 2D COFs for capacitive storage.
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