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


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

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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, Accepted Manuscript
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    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, Accepted Manuscript , DOI: 10.1039/C7NR09146J

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