Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 611, Issue -, Pages 171-178Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.04.085
Keywords
Morphology control; Core/shell arrays; Supercapacitor; Electrochemical performance; Energy storage
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Funding
- National Natural Science Foundation of China [21353003]
- Special Innovation Talents of Harbin Science and Technology [2013RFQXJ145]
- Fundamental Research Funds of the Central University (HEUCFZ)
- Natural Science Foundation of Heilongjiang Province [B201316]
- Program of International S&T Cooperation special project [2013DFA50480]
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Co3O4 nanoarchitectures with controlled morphologies and Co3O4@MnO2 core/shell arrays have been fabricated via a facile hydrothermal method. Co3O4 nanowires and nanosheets have been obtained by the thermal annealing Co(OH)(2) precursors. Furthermore, the Co3O4 nanowires are used as the scaffold to deposit MnO2 nanosheets to form Co3O4@MnO2 core/shell arrays. MnO2 shells coated on the surface of Co3O4 nanowires show a porous-rich structure, which promotes the electrochemical performance of the electrochemical capacitor. The Co3O4@MnO2 core/shell arrays exhibit high specific capacitance of 1280 F/g, good rate performance, and excellent cycling stability. The growth roadmap in this work is a facile strategy to design and synthesize transition metal oxides and hydroxide hierarchical hetero-structures for the next generation electrochemical energy storage, catalysis, and gas sensing applications. (C) 2014 Elsevier B.V. All rights reserved.
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