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Issue 15, 2018
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A 3D interconnected NH4Fe0.6V2.4O7.4@C nanocomposite with superior sodium storage properties

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Abstract

A novel 3D interconnected NH4Fe0.6V2.4O7.4@C nanocomposite was in situ synthesized through a facile hydrothermal reaction at low temperature (98 °C), and its electrochemical performance as a cathode for sodium-ion batteries (SIBs) was investigated for the first time. Under the intercalation of Fe3+ and carbon-coating, as-prepared samples turned to 3D interconnected structures, which were composed of NH4Fe0.6V2.4O7.4 nanoparticles and carbon chains. The 3D interconnected NH4Fe0.6V2.4O7.4@0.5 wt%C nanocomposite exhibits a high discharge specific capacity of 306 mA h g−1 at a current density of 20 mA g−1 and a high-rate capacity of 130 mA h g−1 at 0.4 A g−1. The results of EIS and ex situ SEM indicated that the 3D interconnected NH4Fe0.6V2.4O7.4@0.5 wt%C nanocomposite possesses good electrical conductivity and structural stability. The ex situ XRD results suggest that NH4Fe0.6V2.4O7.4@0.5 wt%C undergoes a reversible insertion/de-insertion mechanism during a charge/discharge process. Our work demonstrates that the 3D interconnected NH4Fe0.6V2.4O7.4@C nanocomposite material could be considered as a potential cathode for sodium ion batteries.

Graphical abstract: A 3D interconnected NH4Fe0.6V2.4O7.4@C nanocomposite with superior sodium storage properties

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Publication details

The article was received on 09 Dec 2017, accepted on 22 Feb 2018 and first published on 07 Mar 2018


Article type: Paper
DOI: 10.1039/C7NR09146J
Citation: Nanoscale, 2018,10, 6992-7001
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    A 3D interconnected NH4Fe0.6V2.4O7.4@C nanocomposite with superior sodium storage properties

    Z. Xiong, L. Chen, L. Zhao, Y. Zhao, J. Feng, C. M. Huang, Y. Dong, H. Zhang, Y. Wang, Q. Kuang, Q. Fan, S. Liu and S. Chen, Nanoscale, 2018, 10, 6992
    DOI: 10.1039/C7NR09146J

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