Hierarchical MnMoO4/CoMoO4 heterostructured nanowires with enhanced supercapacitor performance

Li-Qiang Mai (), Fan Yang, Yun-Long Zhao, Xu Xu, Lin Xu and Yan-Zhu Luo
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Li-Qiang Mai: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology
Fan Yang: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology
Yun-Long Zhao: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology
Xu Xu: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology
Lin Xu: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology
Yan-Zhu Luo: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology

Nature Communications, 2011, vol. 2, issue 1, 1-5

Abstract: Abstract Recent attention has been focused on the synthesis and application of complex heterostructured nanomaterials, which can have superior electrochemical performance than single-structured materials. Here we synthesize the three-dimensional (3D) multicomponent oxide, MnMoO4/CoMoO4. Hierarchical heterostructures are successfully prepared on the backbone material MnMoO4 by a simple refluxing method under mild conditions; and surface modification is achieved. We fabricate asymmetric supercapacitors based on hierarchical MnMoO4/CoMoO4 heterostructured nanowires, which show a specific capacitance of 187.1 F g−1 at a current density of 1 A g−1, and good reversibility with a cycling efficiency of 98% after 1,000 cycles. These results further demonstrate that constructing 3D hierarchical heterostructures can improve electrochemical properties. 'Oriented attachment' and 'self-assembly' crystal growth mechanisms are proposed to explain the formation of the heterostructures.

Date: 2011
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DOI: 10.1038/ncomms1387

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