期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 20, 期 8, 页码 1506-1510出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b923834d
关键词
-
资金
- National Natural Science Foundation of China [50872016]
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 similar to 1 mu m and the diameter of similar to 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.
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