Design and fabrication of novel optimized electrode materials are important for the development of new batteries for energy storage applications. Herein, we report on a hierarchical bulk electrode material with a tail...
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Design and fabrication of novel optimized electrode materials are important for the development of new batteries for energy storage applications. Herein, we report on a hierarchical bulk electrode material with a tailored nanostructure that which consists of three components: a NH 4 V 4 O 10 nanowire as an active skeleton, an intermediate polymer layer (polypyrrole, PPy), and a metal oxide layer (MnO 2 ) as the outside shell. The NH 4 V 4 O 10 -PPy-MnO 2 nanowires exhibit present higher capacitance than that of the simple NH 4 V 4 O 10 -PPy [email protected] or NH 4 V 4 O 10 nanowires. The structure of double shells of combined PPy and MnO 2 is a key factor in enhancing their electrochemical performance including high specific capacitance and excellent cycling stability. Our V-based [email protected] @shell structure can serve as freestanding, compressible electrodes for various energy devices.
The selenylation/sulfuration of magnetic precursor brings about the great challenges to construct magnetic transition metal dichalcogenides (TMDs)-based multicomponent nanocomposites (MCNCs), which greatly hinders the...
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The selenylation/sulfuration of magnetic precursor brings about the great challenges to construct magnetic transition metal dichalcogenides (TMDs)-based multicomponent nanocomposites (MCNCs), which greatly hinders the improvements in magnetic loss ability and impedance matching characteristic. Theoretically speaking, the addition of carbon layer is conducive to protect the magnetic nanoparticles, optimize the impedance matching, strengthen the interfacial polarization and magnetic loss abilities, and so on. In order to verify these ideas, herein, we elaborately designed and produced [email protected] ZnSe/FeSe 2 @MoSe 2 and [email protected] @shell ZnFe 2 O 4 @ [email protected] 2 flower-like MCNCs. The results of comparative study indicated that the as-prepared ZnSe/FeSe 2 @MoSe 2 and ZnFe 2 O 4 @ [email protected] 2 with the different MoSe 2 contents and flower-like geometrical morphologies could be synthesized by regulating the amounts of Mo and Se sources. And the introduction of carbon layer not only effectively inhibited the selenylation of ZnFe 2 O 4 precursor, but also greatly improved the impedance matching characteristic, dielectric and magnetic loss capabilities. The obtained ZnFe 2 O 4 @ [email protected] 2 MCNCs presented the excellent comprehensive microwave absorption properties (MAPs) including strong absorption capability, broad frequency bandwidth and thin matching thickness. Therefore, our findings not only presented a simple and viable route to produce magnetic TMDs-based MCNCs, but also provided an effective strategy to boost their comprehensive MAPs.
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