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Nanomaterials 2017, 7(4), 81;

Stepwise Splitting Growth and Pseudocapacitive Properties of Hierarchical Three-Dimensional Co3O4 Nanobooks

State Laboratory of Surface and Interface Science and Technology, Zhengzhou University of Light Industry, Zhengzhou 450002, China
American Advanced Nanotechnology, Houston, TX 77459, USA
Author to whom correspondence should be addressed.
Academic Editors: Bingqing Wei and Jian-Gan Wang
Received: 6 January 2017 / Revised: 23 March 2017 / Accepted: 4 April 2017 / Published: 10 April 2017
(This article belongs to the Special Issue Nanomaterials Based Fuel Cells and Supercapacitors)
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Three-dimensional hierarchical Co3O4 nanobooks have been synthesized successfully on a large scale by calcining orthorhombic Co(CO3)0.5(OH)·0.11H2O precursors with identical morphologies. Based on the influence of reaction time and urea concentration on the nanostructures of the precursors, a stepwise splitting growth mechanism can be proposed to understand the formation of the 3D nanobooks. The 3D Co3O4 nanobooks exhibit excellent pseudocapacitive performances with specific capacitances of 590, 539, 476, 453, and 421 F/g at current densities of 0.5, 1, 2, 4, and 8 A/g, respectively. The devices can retain ca. 97.4% of the original specific capacitances after undergoing charge–discharge cycle tests 1000 times continuously at 4 A/g. View Full-Text
Keywords: Co3O4; nanobooks; pseudocapacitors; stepwise splitting; hierarchical materials Co3O4; nanobooks; pseudocapacitors; stepwise splitting; hierarchical materials

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chen, H.; Lu, S.; Gong, F.; Liu, H.; Li, F. Stepwise Splitting Growth and Pseudocapacitive Properties of Hierarchical Three-Dimensional Co3O4 Nanobooks. Nanomaterials 2017, 7, 81.

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