title: Hierarchical MnMoO(4)/CoMoO(4) heterostructured nanowires with enhanced supercapacitor performance.
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, MnMoO(4)/CoMoO(4). Hierarchical heterostructures are successfully prepared on the backbone material MnMoO(4) by a simple refluxing method under mild conditions; and surface modification is achieved. We fabricate asymmetric supercapacitors based on hierarchical MnMoO(4)/CoMoO(4) 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.
authors: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology, Wuhan 430070, China. mlq@cmliris.harvard.edu
authors: Li-Qiang
authors: LQ
authors: Mai
authors: Fan
authors: F
authors: Yang
authors: Yun-Long
authors: YL
authors: Zhao
authors: Xu
authors: X
authors: Xu
authors: Lin
authors: L
authors: Xu
authors: Yan-Zhu
authors: YZ
authors: Luo
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D025802:Electric Capacitance; D004563:Electrochemistry / Q000379:methods; D017895:Manganese Compounds / Q000737:chemistry*; D008982:Molybdenum / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D053770:Nanowires / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D017895:Manganese Compounds; C044659:molybdate; D003035:Cobalt; D008982:Molybdenum