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    An aqueous 2.1 V pseudocapacitor with MXene and V-MnO2 electrodes

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    Type
    Article
    Authors
    Wu, Jiabin
    Li, Qun
    Shuck, Christopher E.
    Maleski, Kathleen
    Alshareef, Husam N. cc
    Zhou, Jun
    Gogotsi, Yury
    Huang, Liang
    KAUST Department
    Functional Nanomaterials and Devices Research Group
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    OSR-CRG2016-2963
    Date
    2021-05-26
    Online Publication Date
    2021-05-26
    Print Publication Date
    2022-01
    Embargo End Date
    2022-05-26
    Submitted Date
    2021-03-21
    Permanent link to this record
    http://hdl.handle.net/10754/669420
    
    Metadata
    Show full item record
    Abstract
    MXenes have shown record-breaking redox capacitance in aqueous electrolytes, but in a limited voltage window due to oxidation under anodic potential and hydrogen evolution under high cathodic potential. Coupling Ti3C2Tx MXene negative electrode with RuO2 or carbon-based positive electrodes expanded the voltage window in sulfuric acid electrolyte to about 1.5 V. Here, we present an asymmetric pseudocapacitor using abundant and eco-friendly vanadium doped MnO2 as the positive and Ti3C2Tx MXene as the negative electrode in a neutral 1 M Li2SO4 electrolyte. This all-pseudocapacitive asymmetric device not only uses a safer electrolyte and is a much less expensive counter-electrode than RuO2, but also can operate within a 2.1 V voltage window, leading to a maximum energy density of 46 Wh/kg. This study also demonstrates the possibility of using MXene electrodes to expand the working voltage window of traditional redox-capable materials.[Figure not available: see fulltext.]
    Citation
    Wu, J., Li, Q., Shuck, C. E., Maleski, K., Alshareef, H. N., Zhou, J., … Huang, L. (2021). An aqueous 2.1 V pseudocapacitor with MXene and V-MnO2 electrodes. Nano Research. doi:10.1007/s12274-021-3513-x
    Sponsors
    This work was financially supported by the National Natural Science Foundation of China (Nos. 51972124, 51902115, and 51872101). Research reported in this publication was also supported by King Abdullah University of Science and Technology (KAUST) under the KAUST-Drexel Competitive Research Grant (No. OSR-CRG2016-2963 sub 11206). The authors express their gratitude to late Prof. J. Zhou for valuable discussions. The authors thank to the facility support of the Center for Nanoscale Characterization & Devices, WNLO-HUST and the Analysis and Testing Center, HUST.
    Publisher
    Springer Science and Business Media LLC
    Journal
    Nano Research
    DOI
    10.1007/s12274-021-3513-x
    Additional Links
    https://link.springer.com/10.1007/s12274-021-3513-x
    ae974a485f413a2113503eed53cd6c53
    10.1007/s12274-021-3513-x
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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