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Issue 44, 2017
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Controllable formation of multi-layered SnO2@Fe2O3 sandwich cubes as a high-performance anode for Li-ion batteries

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Abstract

The design and controllable synthesis of hollow multi-layered “sandwich” nanostructures offer opportunities for metal oxides to buffer the volume expansion and aggregation due to coalescence into bulk structures, while realizing improved tap density and superior ion transport. We report the intentional construction of Fe2O3 nanorod-assembled layers to cover and fill the surface and interlayer of double-shelled SnO2 hollow nanocubes (HNCs) to form multi-layered SnO2@Fe2O3 sandwich nanocubes (SNCs). The crystallinity and morphological characteristics confirm that the dense well-aligned Fe2O3 nanorods vertically cover all surfaces of the SnO2 layers. When used as the anode active material for lithium-ion batteries (LIBs), these sandwich hetero-nanostructures demonstrate evidently improved Li ion storage performances compared to pure SnO2, with higher specific capacity and cyclability (750.8 mA h g−1 after 200 cycles at a current density of 500 mA g−1) due to the synergistic effect of the hollow multi-layered nanostructure and uniform Fe2O3 hetero-coating.

Graphical abstract: Controllable formation of multi-layered SnO2@Fe2O3 sandwich cubes as a high-performance anode for Li-ion batteries

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Publication details

The article was received on 12 Sep 2017, accepted on 26 Oct 2017 and first published on 27 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR06787A
Citation: Nanoscale, 2017,9, 17576-17584
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    Controllable formation of multi-layered SnO2@Fe2O3 sandwich cubes as a high-performance anode for Li-ion batteries

    Y. Zeng, J. Luo, Y. Wang, L. Qiao, B. Zou and W. Zheng, Nanoscale, 2017, 9, 17576
    DOI: 10.1039/C7NR06787A

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