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Issue 19, 2015
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Mesoporous quasi-single-crystalline NiCo2O4 superlattice nanoribbons with optimizable lithium storage properties

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Abstract

Mesoporous single-crystalline NiCo2O4 nanoribbons have been fabricated via a hexamethylenetetramine (HMT)-assisted hydrothermal method applied to Ni–Co precursor nanobelts, followed by annealing in an air atmosphere. The mesoporous single-crystalline feature was demonstrated by field-emission scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, and N2 isotherm analyses. The specific surface area and pore size distribution aspects of the porous profile of the as-obtained spinel NiCo2O4 products could be tuned feasibly by changing the post-treatment temperature of the precursors, which, hence, allowed improvements to the electrochemical performance of the as-obtained products. As expected, when applied as an anode material in lithium-ion batteries, the mesoporous single-crystalline NiCo2O4 nanoribbons delivered a high specific capacity, excellent rate capability, and outstanding cycling performance. The reversible discharge capacity could reach 1198 mA h g−1 after 60 discharge–charge cycles at a current density of 200 mA g−1. The superior electrochemical performance can be attributed to the unique structure, including the suitable pore size distribution, mesoporous single-crystalline feature, enlarged specific surface area, and highly textured nanostructure, as well as synergetic effects of the different metal ions. This synthetic strategy could be extended to synthesize other mesoporous single-crystalline functional materials.

Graphical abstract: Mesoporous quasi-single-crystalline NiCo2O4 superlattice nanoribbons with optimizable lithium storage properties

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Publication details

The article was received on 14 Feb 2015, accepted on 28 Mar 2015 and first published on 30 Mar 2015


Article type: Paper
DOI: 10.1039/C5TA01229E
Citation: J. Mater. Chem. A, 2015,3, 10336-10344
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    Mesoporous quasi-single-crystalline NiCo2O4 superlattice nanoribbons with optimizable lithium storage properties

    B. Li, J. Feng, Y. Qian and S. Xiong, J. Mater. Chem. A, 2015, 3, 10336
    DOI: 10.1039/C5TA01229E

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