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    Direct Pyrolysis of Supermolecules: An Ultrahigh Edge-Nitrogen Doping Strategy of Carbon Anodes for Potassium-Ion Batteries

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    Direct Prolysis.pdf
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    Type
    Article
    Authors
    Zhang, Wenli cc
    Yin, Jian
    Sun, Minglei cc
    Wang, Wenxi
    Chen, Cailing cc
    Altunkaya, Mustafa
    Emwas, Abdul-Hamid M.
    Han, Yu cc
    Schwingenschlögl, Udo cc
    Alshareef, Husam N. cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Science Program
    Computational Physics and Materials Science (CPMS)
    Functional Nanomaterials and Devices Research Group
    Inorganics
    Material Science and Engineering Program
    NMR
    Nanostructured Functional Materials (NFM) laboratory
    Physical Science and Engineering (PSE) Division
    Date
    2020-05-14
    Online Publication Date
    2020-05-14
    Print Publication Date
    2020-06
    Embargo End Date
    2021-05-15
    Submitted Date
    2020-02-01
    Permanent link to this record
    http://hdl.handle.net/10754/662843
    
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    Show full item record
    Abstract
    Most reported carbonaceous anodes of potassium-ion batteries (PIBs) have limited capacities. One approach to improve the performance of carbon anodes is edge-nitrogen doping, which effectively enhances the K-ion adsorption energy. It remains challenging to achieve high edge-nitrogen doping due to the difficulty in controlling the nitrogen dopant configuration. Herein, a new synthesis strategy is proposed to prepare carbon anodes with ultrahigh edge-nitrogen doping for high-performance PIBs. Specifically, self-assembled supermolecule precursors derived from pyromellitic acid and melamine are directly pyrolyzed. During the pyrolysis process, the amidation and imidization reactions between pyromellitic acid and melamine before carbonization enable the successful carbonization of pyromellitic acid-melamine supermolecule. The obtained 3D nitrogen-doped turbostratic carbon (3D-NTC) possesses a 3D framework composed of carbon nanosheets, turbostratic crystalline structure, and an ultrahigh edge-nitrogen-doping level up to 16.8 at% (73.7% of total 22.8 at% nitrogen doping). These features endow 3D-NTCs with remarkable performances as PIB anodes. The 3D-NTC anode displays a high capacity of 473 mAh g-1 , robust rate capability, and a long cycle life of 500 cycles with a high capacity retention of 93.1%. This new strategy will boost the development of carbon anodes for rechargeable alkali-metal-ion batteries.
    Citation
    Zhang, W., Yin, J., Sun, M., Wang, W., Chen, C., Altunkaya, M., … Alshareef, H. N. (2020). Direct Pyrolysis of Supermolecules: An Ultrahigh Edge-Nitrogen Doping Strategy of Carbon Anodes for Potassium-Ion Batteries. Advanced Materials, 2000732. doi:10.1002/adma.202000732
    Sponsors
    The research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). The authors thank the Core Laboratories at KAUST for their excellent support.
    Publisher
    Wiley
    Journal
    Advanced Materials
    DOI
    10.1002/adma.202000732
    PubMed ID
    32410270
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202000732
    ae974a485f413a2113503eed53cd6c53
    10.1002/adma.202000732
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Science Program; Material Science and Engineering Program; Computational Physics and Materials Science (CPMS)

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