Controlled Chemical Vapor Deposition for Synthesis of Nanowire Arrays of Metal–Organic Frameworks and Their Thermal Conversion to Carbon/Metal Oxide Hybrid Materials

• DOI: 10.1021/acs.chemmater.8b00836
• Publication Date: 2018-04-23T17:06:09Z
• Authors: Christine Young; Jie Wang; Jeonghun Kim; Yoshiyuki Sugahara; Joel Henzie; Yusuke Yamauchi
• Keywords: Nanoporous; Carbon fibers

Metal–organic frameworks (MOFs) can serve as high-surface-area templates to generate hierarchically ordered nanoporous carbon electrodes for high-performance supercapacitor devices. Here we describe a simple chemical approach synthesize dense three-dimensional (3D) arrays of core–shell ZnO@ZIF-8 and Co(CO3)0.5(OH)·0.11H2O@ZIF-67 nanowires on conductive cloth. Annealing the structures at high temperatures converted MOF shell into composite (NC) mixed with metal oxides. The conformal nature MOF-coating process generates NC film continuous paths from outer surfaces down flexible electrode. Carbonization ZIF-67 transforms material sp2 type Co3O4 nanostructures. Because is faradic oxide theoretical capacitance, these Co3O4/NC hybrid heterostructure are promising candidate use in an electrochemical device. had good performance exhibited areal capacitance 1.22 F·cm–2 0.5 mA·cm–2. Conformal deposition MOFs via vapor method offers new platform design conductive, ultrahigh surface area that preserve 3D morphology applications supercapacitors electrocatalysis.