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    Covalent Organic Frameworks as Negative Electrodes for High-Performance Asymmetric Supercapacitors

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    Type
    Article
    Authors
    Kandambeth, Sharath cc
    Jia, Jiangtao cc
    Wu, Hao cc
    Kale, Vinayak Swamirao cc
    Parvatkar, Prakash Tukaram cc
    Czaban-Jozwiak, Justyna
    Zhou, Sheng
    Xu, Xiangming cc
    Ameur, Zied Ouled
    Abou-Hamad, Edy
    Emwas, Abdul-Hamid M.
    Shekhah, Osama cc
    Alshareef, Husam N. cc
    Eddaoudi, Mohamed cc
    KAUST Department
    Advanced Membranes and Porous Materials CenterPhysical Science and Engineering DivisionFunctional Materials DesignDiscovery and Development Research Group (FMD<sup>3</sup>)King Abdullah University of Science and Technology (KAUST) Thuwal 23955–6900 Saudi Arabia
    Advanced Membranes and Porous Materials Research Center
    Chemical Science
    Chemical Science Program
    Core LabsKing Abdullah University of Science and Technology (KAUST) Thuwal 23955–6900 Saudi Arabia
    Functional Materials Design, Discovery and Development (FMD3)
    Functional Nanomaterials and Devices Research Group
    Imaging and Characterization Core Lab
    Material Science and Engineering Program
    NMR
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    OSR-CRG2017-3379
    Date
    2020-09-02
    Online Publication Date
    2020-09-02
    Print Publication Date
    2020-10
    Embargo End Date
    2021-09-02
    Submitted Date
    2020-05-18
    Permanent link to this record
    http://hdl.handle.net/10754/665010
    
    Metadata
    Show full item record
    Abstract
    New covalent organic frameworks (COFs), encompassing redox-functionalized moieties and an aza-fused π-conjugated system, are designed, synthesized, and deployed as negative electrodes in asymmetric supercapacitors (ASC), for the first time. The Hex-Aza-COFs are synthesized based on the solvothermal condensation reaction of cyclohexanehexone and redox-functionalized aromatic tetramines with benzoquinone (Hex-Aza-COF-2) or phenazine (Hex-Aza-COF-3). The redox-functionalized Hex-Aza-COFs show a specific capacitance of 585 F g−1 for Hex-Aza-COF-2 and 663 F g−1 for Hex-Aza-COF-3 in a three-electrode configuration. These values are the highest among reported COF materials and are comparable with state-of-the-art pseudocapacitive electrodes. The Hex-Aza-COFs exhibit a wide voltage window (0 to −1.0 V), which allow the construction of a two-electrode ASC device by combining them with RuO2. The complementary potential windows of Hex-Aza-COF-3 and RuO2 enable an asymmetric device with a high voltage window of 1.7 V. The RuO2//Hex-Aza-COF-3 ASC device achieves an energy density value of 23.3 W h kg−1 at a power density of 661.2 W kg−1. The newly developed negative COF materials open new prospects for the development of high-performance ASCs.
    Citation
    Kandambeth, S., Jia, J., Wu, H., Kale, V. S., Parvatkar, P. T., Czaban-Jóźwiak, J., … Eddaoudi, M. (2020). Covalent Organic Frameworks as Negative Electrodes for High-Performance Asymmetric Supercapacitors. Advanced Energy Materials, 2001673. doi:10.1002/aenm.202001673
    Sponsors
    S.K. and J. J. contributed equally to this work. This work was financially supported by King Abdullah University of Science and Technology (KAUST) under Award No. OSR-CRG2017-3379. The authors thank Mrinal K. Hota for his valuable help during the electrochemical experiments.
    Publisher
    Wiley
    Journal
    Advanced Energy Materials
    DOI
    10.1002/aenm.202001673
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.202001673
    ae974a485f413a2113503eed53cd6c53
    10.1002/aenm.202001673
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Functional Materials Design, Discovery and Development (FMD3); Chemical Science Program; Material Science and Engineering Program

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