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  • High-Mass-Loading Porous Ti3C2Tx Films for Ultrahigh-Rate Pseudocapacitors

    Author(s)
    Kong, Jing
    Yang, Huachao
    Guo, Xinzheng
    Yang, Shiling
    Huang, Zhesong
    Lu, Xinchao
    Bo, Zheng
    Yan, Jianhua
    Cen, Kefa
    Ostrikov, Kostya Ken
    Griffith University Author(s)
    Ostrikov, Kostya (Ken)
    Year published
    2020
    Metadata
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    Abstract
    Mass production of ordered and porous three-dimensional (3D) electrodes is a crucial prerequisite for practical energy storage devices. MXenes have drawn considerable attention as pseudocapacitive materials for outstanding electric conductivity and surface redox reactions; however, they face challenges for achieving 3D porous architectures especially at high mass loadings. Herein we propose a reduced-repulsion freeze-casting assembly concept via interlayer interaction engineering for constructing 3D porous Ti3C2Tx films, wherein interlayer repulsion is minimized via less electronegative functional groups and charge screening ...
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    Mass production of ordered and porous three-dimensional (3D) electrodes is a crucial prerequisite for practical energy storage devices. MXenes have drawn considerable attention as pseudocapacitive materials for outstanding electric conductivity and surface redox reactions; however, they face challenges for achieving 3D porous architectures especially at high mass loadings. Herein we propose a reduced-repulsion freeze-casting assembly concept via interlayer interaction engineering for constructing 3D porous Ti3C2Tx films, wherein interlayer repulsion is minimized via less electronegative functional groups and charge screening effect based on quantum calculations. 3D Ti3C2Tx films deliver a capacitance of 207.9 F g-1 at 10 V s-1, which demonstrates 58.6% capacitance retention with a 1000-fold scan rate increase. The capacitive performance is almost independent of electrode mass loading up to 16.18 mg cm-2, exhibiting ultrahigh areal capacitance of 3731 mF cm-2 and energy density of 336.7 μWh cm-2.
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    Journal Title
    ACS Energy Letters
    Volume
    5
    Issue
    7
    DOI
    https://doi.org/10.1021/acsenergylett.0c00704
    Subject
    Nanotechnology
    Science & Technology
    Physical Sciences
    Chemistry, Physical
    Electrochemistry
    Publication URI
    http://hdl.handle.net/10072/397818
    Collection
    • Journal articles

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