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Issue 6, 2015
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Micro-nanostructured CuO/C spheres as high-performance anode materials for Na-ion batteries

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Abstract

In this paper, we report on the synthesis of micro-nanostructured CuO/C spheres by aerosol spray pyrolysis and their application as high-performance anodes in sodium-ion batteries. Micro-nanostructured CuO/C spheres with different CuO contents were synthesized through aerosol spray pyrolysis by adjusting the ratio of reactants and heat-treated by an oxidation process. The as-prepared CuO/C spheres show uniformly spherical morphology, in which CuO nanoparticles (∼10 nm) are homogeneously embedded in the carbon matrix (denoted as 10-CuO/C). The electrochemical performance of 10-CuO/C with a carbon weight of 44% was evaluated as the anode material for Na-ion batteries. It can deliver a capacity of 402 mA h g−1 after 600 cycles at a current density of 200 mA g−1. Furthermore, a capacity of 304 mA h g−1 was obtained at a high current density of 2000 mA g−1. The superior electrochemical performance of the micro-nanostructured CuO/C spheres leads to the enhancement of the electronic conductivity of the nanocomposite and the accommodation of the volume variation of CuO/C during charge/discharge cycling.

Graphical abstract: Micro-nanostructured CuO/C spheres as high-performance anode materials for Na-ion batteries

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Supplementary files

Article information


Submitted
01 Nov 2014
Accepted
24 Dec 2014
First published
26 Dec 2014

Nanoscale, 2015,7, 2770-2776
Article type
Paper
Author version available

Micro-nanostructured CuO/C spheres as high-performance anode materials for Na-ion batteries

Y. Lu, N. Zhang, Q. Zhao, J. Liang and J. Chen, Nanoscale, 2015, 7, 2770
DOI: 10.1039/C4NR06432A

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