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  • Ultrafine FeSe nanoparticles embedded into 3D carbon nanofiber aerogels with FeSe/Carbon interface for efficient and long-life sodium storage

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    Yang196410.pdf (1.835Mb)
    Author(s)
    Lv, Chunxiao
    Liu, Hongli
    Li, Daohao
    Chen, Shuai
    Zhang, Huawei
    She, Xilin
    Guo, Xiangxin
    Yang, Dongjiang
    Griffith University Author(s)
    Yang, Dongjiang
    Year published
    2019
    Metadata
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    Abstract
    The key challenge for high-performance sodium-ion batteries is the exploitation of appropriate electrode materials with a long cycling stability and high rate capability. This study reports the synthesis of a composite of ultrafine FeSe nanoparticles (NPs) and carbon nanofiber aerogel (CNFA) as anode material for SIBs. The composite features ultra-small (∼5 nm) NPs of FeSe uniformly embedded in interconnect three dimensional (3D) carbon nanofiber with large surface area, highly conductive network, and robust structural stability. As expected, the FeSe-CNFA-700 sample delivers a capacity as high as ∼313 mA h g−1 at 2000 mA g−1 ...
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    The key challenge for high-performance sodium-ion batteries is the exploitation of appropriate electrode materials with a long cycling stability and high rate capability. This study reports the synthesis of a composite of ultrafine FeSe nanoparticles (NPs) and carbon nanofiber aerogel (CNFA) as anode material for SIBs. The composite features ultra-small (∼5 nm) NPs of FeSe uniformly embedded in interconnect three dimensional (3D) carbon nanofiber with large surface area, highly conductive network, and robust structural stability. As expected, the FeSe-CNFA-700 sample delivers a capacity as high as ∼313 mA h g−1 at 2000 mA g−1 after 1000 cycles and ultrahigh rate capability up to 20000 mA g−1. The significantly improved electrochemical performance could be attributed to the unique structure that combines a variety of advantages: easy access of electrolyte to the 3D network structure, pseudocapacitve charge storage and fast Na ion diffusion processes. The results confirm the intercalation of Na+ into the 3D ultrafine FeSe nanoparticles/carbon nanofiber aerogel is enhanced through the strong interaction between FeSe nanocrystals and the carbon layer. The density functional theory calculations demonstrate that the unique FeSe/carbon layer interface in 3D network structure can enhance Na storage due to the small energy barrier and negative adsorption energy.
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    Journal Title
    Carbon
    Volume
    143
    DOI
    https://doi.org/10.1016/j.carbon.2018.10.091
    Copyright Statement
    © 2019 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Physical Sciences
    Chemical Sciences
    Engineering
    Science & Technology
    Technology
    Chemistry, Physical
    Materials Science, Multidisciplinary
    Publication URI
    http://hdl.handle.net/10072/386839
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    • Journal articles

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