Covalent Organic Frameworks as Negative Electrodes for High-Performance Asymmetric Supercapacitors
Kale, Vinayak Swamirao
Parvatkar, Prakash Tukaram
Ameur, Zied Ouled
Emwas, Abdul-Hamid M.
Alshareef, Husam N.
KAUST DepartmentAdvanced 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 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
Physical Science and Engineering (PSE) Division
KAUST Grant NumberOSR-CRG2017-3379
Online Publication Date2020-09-02
Print Publication Date2020-10
Embargo End Date2021-09-02
Permanent link to this recordhttp://hdl.handle.net/10754/665010
MetadataShow full item record
AbstractNew 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.
CitationKandambeth, 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
SponsorsS.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.
JournalAdvanced Energy Materials