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Issue 5, 2014
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A new synthetic route to hollow Co3O4 octahedra for supercapacitor applications

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Abstract

Co3O4 hollow octahedra were successfully synthesized via a facile one-step solvothermal route. Time-resolved electron microscopy and X-ray diffraction analyses revealed that the Co3O4 hollow octahedra were formed through the self-assembly of primary nanocrystals followed by subsequent Ostwald ripening. Subtle control over the reaction conditions led to different morphologies (hexagonal plates and nanocubes) and crystal structures (β-Co(OH)2–Co3O4 composite). The unique hollow nanostructure rendered our Co3O4 potentially useful for charge-storage applications. To prove its usefulness, the pseudocapacitive performance of the Co3O4 hollow octahedra as a supercapacitor electrode was evaluated and exhibited a charge storage capacity of 192 F g−1 with good long-term cyclability.

Graphical abstract: A new synthetic route to hollow Co3O4 octahedra for supercapacitor applications

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Publication details

The article was received on 12 Sep 2013, accepted on 18 Nov 2013 and first published on 19 Nov 2013


Article type: Paper
DOI: 10.1039/C3CE41840E
Citation: CrystEngComm, 2014,16, 826-833
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    A new synthetic route to hollow Co3O4 octahedra for supercapacitor applications

    Y. Cao, F. Yuan, M. Yao, J. H. Bang and J. Lee, CrystEngComm, 2014, 16, 826
    DOI: 10.1039/C3CE41840E

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