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Issue 37, 2019
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Facile thermochemical conversion of FeOOH nanorods to ZnFe2O4 nanorods for high-rate lithium storage

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Abstract

We successfully prepared ZnFe2O4 nanorods (ZFO-NRs) by a simple thermochemical reaction of FeOOH nanorods with Zn(NO3)2 to use as an anode material in lithium-ion batteries. The FeOOH nanorod shape was well maintained after conversion into ZFO-NR with the formation of porous structures. The nanorod structure and porous morphology facilitate Li+ transport, improve the reaction rates owing to the larger contact area with the electrolyte, and reduce the mechanical stress during lithiation/delithiation. The ZFO-NR electrode exhibited a reversible capacity of 725 mA h g−1 at 1 A g−1 and maintained a capacity of 668 mA h g−1 at 2 A g−1; these capacities are much higher and more stable than those of ZFO nanoparticles prepared by a hydrothermal method (ZFO-HT) (216 and 117 mA h g−1 at 1 and 2 A g−1, respectively). Although ZFO-NRs exhibited high, stable capacities at moderate current densities for charging and discharging, the capacity rapidly decreased under fast charging/discharging conditions (>4 A g−1). However, carbonized ZFO-NR (C/ZFO-NR) exhibited an improved reversible capacity and rate capability resulting from an increased conductivity compared with ZFO-NRs. The specific capacity of C/ZFO-NRs at 1 A g−1 was 765 mA h g−1; notably, a capacity of 680 mA h g−1 was maintained at 6 A g−1.

Graphical abstract: Facile thermochemical conversion of FeOOH nanorods to ZnFe2O4 nanorods for high-rate lithium storage

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Publication details

The article was received on 13 May 2019, accepted on 02 Jul 2019 and first published on 09 Jul 2019


Article type: Paper
DOI: 10.1039/C9RA03600H
RSC Adv., 2019,9, 21444-21450
  • Open access: Creative Commons BY-NC license
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    Facile thermochemical conversion of FeOOH nanorods to ZnFe2O4 nanorods for high-rate lithium storage

    Y. Park, M. Oh, Y. Lee and H. Park, RSC Adv., 2019, 9, 21444
    DOI: 10.1039/C9RA03600H

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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