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    Model-Based Design of Graphite-Compatible Electrolytes in Potassium-Ion Batteries

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    Primary Manuscript.pdf
    Size:
    2.054Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Embargo End Date:
    2021-07-24
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    Type
    Article
    Authors
    Zhang, Jiao
    Cao, Zhen
    Zhou, Lin
    Liu, Gang
    Park, Geon-Tae
    Cavallo, Luigi cc
    Wang, Limin cc
    Alshareef, Husam N. cc
    Sun, Yang-Kook cc
    Ming, Jun cc
    KAUST Department
    Chemical Science Program
    Functional Nanomaterials and Devices Research Group
    KAUST Catalysis Center (KCC)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2020-07-24
    Online Publication Date
    2020-07-24
    Print Publication Date
    2020-08-14
    Embargo End Date
    2021-07-24
    Submitted Date
    2020-07-30
    Permanent link to this record
    http://hdl.handle.net/10754/664518
    
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    Abstract
    Potassium-ion batteries (KIBs) are attractive alternatives to lithium-ion batteries (LIBs) because of their lower cost and global potassium sustainability. However, designing compatible electrolytes with graphite anode remains challenging. This is because the electrolyte decomposition and/or graphite exfoliation (due to K+–solvent co-insertion) always exist, which is much harder to overcome compared to the case of LIBs because of the higher activities of K+. Herein, we report a general principle to design compatible electrolytes with the graphite anode, where the K+ can be reversibly (de)intercalated. We find that the electrolyte composition is critical to determining the graphite performance, which can be tuned by the kind of solvent, anion, additives, and concentration. We present a new interfacial model to understand the variation in performance (i.e., K+ (de)intercalation or K+–solvent co-insertion or decomposition). Our model is distinctly different from the solid electrolyte interphase interpretation. This work offers new opportunities to design high-performance KIBs and potassium-ion sulfur batteries. Particularly, we present new guideline to design electrolytes for KIBs and other advanced mobile (ion) batteries.
    Citation
    Zhang, J., Cao, Z., Zhou, L., Liu, G., Park, G.-T., Cavallo, L., … Ming, J. (2020). Model-Based Design of Graphite-Compatible Electrolytes in Potassium-Ion Batteries. ACS Energy Letters, 2651–2661. doi:10.1021/acsenergylett.0c01401
    Sponsors
    This work is supported by the National Natural Science Foundation of China (21978281 and 21975250) and National Key R&D Program of China (SQ2017YFE9128100). The authors also thank the Independent Research Project of the State Key Laboratory of Rare Earth Resources Utilization (110005R086), Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. The research was also supported by King Abdullah University of Science and Technology (KAUST) and Hanyang University.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Energy Letters
    DOI
    10.1021/acsenergylett.0c01401
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsenergylett.0c01401
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsenergylett.0c01401
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; Material Science and Engineering Program; KAUST Catalysis Center (KCC)

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