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Issue 8, 2010
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Anisotropic Co3O4 porous nanocapsules toward high-capacity Li-ion batteries

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Abstract

Anisotropic column-shaped porous Co3O4 nanocapsules were successfully synthesized via a solvothermal route using poly(vinyl pyrrolidone) (PVP) as capping reagent and final heat treatment in air. These anisotropic polycrystalline nanocapsules with the length of ∼1 μm and the diameter of ∼400 nm were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) methods. Detailed proof indicated that the process of CoCO3 precursor growth was dominated by a nucleation and growth, self-organization, and then Ostwald ripening growth mechanism. These column-shaped Co3O4 nanocapsules integrate two beneficial features: hollow cavity and porous shell. When evaluated for Li-ion batteries, they exhibit high reversible capacity (over 1000 mA h g−1) and good cycle performance.

Graphical abstract: Anisotropic Co3O4 porous nanocapsules toward high-capacity Li-ion batteries

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Publication details

The article was received on 12 Nov 2009, accepted on 17 Dec 2009 and first published on 12 Jan 2010


Article type: Paper
DOI: 10.1039/B923834D
Citation: J. Mater. Chem., 2010,20, 1506-1510
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    Anisotropic Co3O4 porous nanocapsules toward high-capacity Li-ion batteries

    J. Liu, H. Xia, L. Lu and D. Xue, J. Mater. Chem., 2010, 20, 1506
    DOI: 10.1039/B923834D

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