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    Electrochemical Zinc Ion Capacitors Enhanced by Redox Reactions of Porous Carbon Cathodes

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    Name:
    Electrochemical_aenm202001705 proof.pdf
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    2.593Mb
    Format:
    PDF
    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Yin, Jian cc
    Zhang, Wenli cc
    Wang, Wenxi
    Alhebshi, Nuha cc
    Salah, Numan cc
    Alshareef, Husam N. cc
    KAUST Department
    Functional Nanomaterials and Devices Research Group
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2020-08-06
    Online Publication Date
    2020-08-06
    Print Publication Date
    2020-10
    Embargo End Date
    2021-08-07
    Submitted Date
    2020-05-21
    Permanent link to this record
    http://hdl.handle.net/10754/664567
    
    Metadata
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    Abstract
    Aqueous electrochemical zinc ion capacitors (ZICs) are promising next-generation energy storage devices because of their high safety, inexpensive raw materials, and long cycle life. Herein, an aqueous ZIC with superior performance is fabricated by employing an oxygen-rich porous carbon cathode. Excellent capacitance and energy density are obtained thanks to the electric double-layer capacitance of porous carbon, and additional pseudocapacitances originating from the variation in oxidation states of oxygen functional groups and the reversible electrochemical hydrogen adsorption and desorption during each round-trip charge–discharge cycle. Moreover, the cycling stability of ZIC is effectively prolonged by suppressing zinc dendrite growth with a simple surface carbon coating strategy. The assembled ZIC delivers a high capacitance of 340.7 F g−1, a high capacity of 179.8 mAh g−1 in a wide voltage window of 0–1.9 V, a maximum energy density of 104.8 Wh kg−1, and an ultrahigh power density of 48.8 kW kg−1. Furthermore, the as-fabricated aqueous ZIC exhibits an ultralong cycle life of 30 000 cycles with a high capacity retention of 99.2%. This work provides a novel design strategy by incorporating reversible hydrogen and oxygen redox reactions to enhance the energy storage capability of aqueous ZICs toward practical energy storage applications.
    Citation
    Yin, J., Zhang, W., Wang, W., Alhebshi, N. A., Salah, N., & Alshareef, H. N. (2020). Electrochemical Zinc Ion Capacitors Enhanced by Redox Reactions of Porous Carbon Cathodes. Advanced Energy Materials, 2001705. doi:10.1002/aenm.202001705
    Sponsors
    J.Y. and W.L.Z. contributed equally to this work. The research reported in this publication was supported by the King Abdullah University of Science and Technology–King Abdulaziz University (KAUST-KAU) Initiative (Grant No. OSR-2018 KAUST-KAU-3903).
    Publisher
    Wiley
    Journal
    Advanced Energy Materials
    DOI
    10.1002/aenm.202001705
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.202001705
    ae974a485f413a2113503eed53cd6c53
    10.1002/aenm.202001705
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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