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  • Sandwich-Like Reduced Graphene Oxide/Carbon Black/Amorphous Cobalt Borate Nanocomposites as Bifunctional Cathode Electrocatalyst in Rechargeable Zinc-Air Batteries

    Author(s)
    Sun, Jiqing
    Yang, Dongjiang
    Lowe, Sean
    Zhang, Lijuan
    Wang, Yazhou
    Zhao, Shenlong
    Liu, Porun
    Wang, Yun
    Tang, Zhiyong
    Zhao, Huijun
    Yao, Xiangdong
    Griffith University Author(s)
    Zhao, Huijun
    Liu, Porun
    Wang, Yun
    Year published
    2018
    Metadata
    Show full item record
    Abstract
    The inhibitively high cost of the noble‐metal‐containing materials has become a major obstacle for the large‐scale application of rechargeable zinc‐air batteries (ZABs). To solve this problem in a practical way, a green and scalable method to prepare sandwich‐like reduced graphene oxide /carbon black/amorphous cobalt borate nanocomposites (rGO/CB/Co‐Bi) is reported. These composites are shown to be a highly efficient and robust bifunctional electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this system, the spontaneous assembly of the GO sheet and CB nanoparticles is demonstrated by ...
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    The inhibitively high cost of the noble‐metal‐containing materials has become a major obstacle for the large‐scale application of rechargeable zinc‐air batteries (ZABs). To solve this problem in a practical way, a green and scalable method to prepare sandwich‐like reduced graphene oxide /carbon black/amorphous cobalt borate nanocomposites (rGO/CB/Co‐Bi) is reported. These composites are shown to be a highly efficient and robust bifunctional electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this system, the spontaneous assembly of the GO sheet and CB nanoparticles is demonstrated by noncovalent interactions to build the sandwich‐like structure with hierarchical pore distribution. The impressive ORR and OER activities of the obtained nanocomposite are attributed to the high conductivity, large surface area, and the hierarchically porous channels. With room‐temperature synthesis and significant activities shown in the demonstrative battery test, the prepared nanocomposite can potentially serve as an alternative for noble‐metal‐based rechargeable ZAB cathode materials.
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    Journal Title
    Advanced Energy Materials
    Volume
    8
    Issue
    27
    DOI
    https://doi.org/10.1002/aenm.201801495
    Subject
    Macromolecular and materials chemistry
    Materials engineering
    Materials engineering not elsewhere classified
    Other engineering
    Reduced graphene oxide
    Amorphous cobalt borate nanocomposites
    Bifunctional cathode electrocatalyst
    Rechargeable zinc-air batteries
    Publication URI
    http://hdl.handle.net/10072/382136
    Collection
    • Journal articles

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