Beilstein J. Nanotechnol.2019,10, 281–293, doi:10.3762/bjnano.10.27
Developing a facile and environmentally friendly approach to the synthesis of nanostructured Ni(OH)2 electrodes for high-performance supercapacitor applications is a great challenge. In this work, we report an extremely simple route to prepare a Ni(OH)2nanopetals network by immersing Ni nanofoam in water. A
binder-free composite electrode, consisting of Ni(OH)2nanopetals network, Ni nanofoam interlayer and Ni-based metallic glass matrix (Ni(OH)2/Ni-NF/MG) with sandwich structure and good flexibility, was designed and finally achieved. Microstructure and morphology of the Ni(OH)2nanopetals were
characterized. It is found that the Ni(OH)2nanopetals interweave with each other and grow vertically on the surface of Ni nanofoam to form an “ion reservoir”, which facilitates the ion diffusion in the electrode reaction. Electrochemical measurements show that the Ni(OH)2/Ni-NF/MG electrode, after immersion in
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Figure 1:
(a) Schematics of the fabrication process of the sandwich-like Ni(OH)2/Ni-NF/MG composite electrode...