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Issue 43, 2018
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Extending cycling life of lithium–oxygen batteries based on novel catalytic nanofiber membrane and controllable screen-printed method

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Abstract

The surface and interface configuration of catalysts has been considered as a useful strategy to achieve high oxygen reduction and oxygen evolution reaction activities for Li–O2 batteries. Herein, the facile synchronous reduction method and screen-printing process are applied to obtain an Ru–rGO catalyst with a 3D porous architecture and oxygen electrodes. Significantly, an ultra-long cycling Li–O2 cell is designed using catalytic membrane decoration. The catalytic membrane is fabricated via electrospinning polyacrylonitrile (PAN) nanofibers directly onto a separator. Then, Ag nanowires and Au nanoparticles are coated on previously obtained PAN scaffolds. After comparing initial Ru–rGO electrode with decorated Ru–rGO (D-Ru-rGO), we infer that the cell with D-Ru-rGO catalyst exhibits enhanced cycling performance towards ORR and OER, higher specific discharge capacity (13 437.8 mA h g−1), extended cycling stability, desirable rate performance, and a lower voltage gap. The insulating PAN polymer framework can directly restrict electron transfer to the Ag/Au catalyst and effectively prevent Ag/Au catalytic sites from direct blockage. Thus, the efficient and effective method proposed in this study offers a new insight into architecture designing and synergetic surface/interface strategy settling.

Graphical abstract: Extending cycling life of lithium–oxygen batteries based on novel catalytic nanofiber membrane and controllable screen-printed method

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Publication details

The article was received on 14 Aug 2018, accepted on 11 Oct 2018 and first published on 12 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA07884J
Citation: J. Mater. Chem. A, 2018,6, 21458-21467
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    Extending cycling life of lithium–oxygen batteries based on novel catalytic nanofiber membrane and controllable screen-printed method

    X. Zhang, W. Fan, H. Li, S. Zhao, J. Wang, B. Wang and C. Li, J. Mater. Chem. A, 2018, 6, 21458
    DOI: 10.1039/C8TA07884J

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