Direct Growth of Triple Cation Metal–Organic Framework on a Metal Substrate for Electrochemical Energy Storage
2019
Metal–organic frameworks (MOFs) offer a robust structure with high surface area together with open metal center sites which easily undergo the reversible redox reaction without damaging the framework; therefore, they are actively considered as a medium for electrochemical energy storage. This article demonstrates the superiority of triple cation metal-terephthalate as charge storage electrodes over their single component counterparts. We report the preparation of ternary metal-terephthalate (CoCuNi-bdc/NF) containing equimolar precursors of Co, Cu, and Ni as metal centers and terephthalic acid (H2 bdc) as the organic linker and its single metal counterparts (Co-bdc/NF, Cu-bdc/NF, and Ni-bdc/NF) on Ni-foam substrate via a one-step facile hydrothermal reaction. The structure and morphologies of the CoCuNi-bdc/NF composite and its single component counterparts are characterized by powder X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and field-emission scanning ...
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