Template-Free Synthesis of Amorphous Double-Shelled Zinc–Cobalt Citrate Hollow Microspheres and Their Transformation to Crystalline ZnCo2O4 Microspheres

A novel and facile approach was developed for the fabrication of amorphous double-shelled zinc–cobalt citrate hollow microspheres and crystalline double-shelled ZnCo2O4 hollow microspheres. In this approach, amorphous double-shelled zinc–cobalt citrate hollow microspheres were prepared through a sim...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2013-06, Vol.5 (12), p.5508-5517
Main Authors: Xie, Qingshui, Li, Feng, Guo, Huizhang, Wang, Laisen, Chen, Yuanzhi, Yue, Guanghui, Peng, Dong-Liang
Format: Article
Language:English
Subjects:
Citrates - chemistry
Cobalt - chemistry
Electrodes
Microscopy, Electron
Microspheres
Nanoparticles - chemistry
Oxides - chemistry
X-Ray Diffraction
Zinc - chemistry
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Summary:A novel and facile approach was developed for the fabrication of amorphous double-shelled zinc–cobalt citrate hollow microspheres and crystalline double-shelled ZnCo2O4 hollow microspheres. In this approach, amorphous double-shelled zinc–cobalt citrate hollow microspheres were prepared through a simple route and with an aging process at 70 °C. The combining inward and outward Ostwald ripening processes are adopted to account for the formation of these double-shelled architectures. The double-shelled ZnCo2O4 hollow microspheres can be prepared via the perfect morphology inheritance of the double-shelled zinc–cobalt citrate hollow microspheres, by calcination at 500 °C for 2 h. The resultant double-shelled ZnCo2O4 hollow microspheres manifest a large reversible capacity, superior cycling stability, and good rate capability.
ISSN:1944-8244
1944-8252
DOI:10.1021/am400696x