Add time:07/31/2019         Source:sciencedirect.com

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 NH4V4O10 nanowire as an active skeleton, an intermediate polymer layer (polypyrrole, PPy), and a metal oxide layer (MnO2) as the outside shell. The NH4V4O10-PPy-MnO2 nanowires exhibit present higher capacitance than that of the simple NH4V4O10-PPy [email protected] or NH4V4O10 nanowires. The structure of double shells of combined PPy and MnO2 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.

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