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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Facile and scalable fabrication of three-dimensional Cu(OH)(2) nanoporous nanorods for solid-state supercapacitors
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Facile and scalable fabrication of three-dimensional Cu(OH)(2) nanoporous nanorods for solid-state supercapacitors

机译:固态超级电容器的三维Cu(OH)(2)纳米多孔纳米棒的便捷和可扩展制造

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摘要

A facile and scalable one-step anodization method has been developed to fabricate three-dimensional (3-D) Cu(OH)(2) nanoporous nanorods on a copper foil substrate, a product that can be used directly as a binder-free electrode for supercapacitors. The unique morphology of the nanorods provides a large amount of active sites for redox reactions, which can be easily accessed by electrolyte ions. Benefiting from that, a high capacitance of 213 mF cm(-2) is obtained, and superior rate capability (62.3% capacitance retention when the scan rate is increased to 10 times) and excellent cyclability (92.0% capacitance retention after 5000 cycles) are achieved. In addition, a flexible and foldable solid-state asymmetric supercapacitor is assembled using the Cu(OH)(2) and activated carbon as the positive and negative electrodes, respectively. The devices deliver a high energy density of 3.68 mW h cm(-3) and a high power density of 5314 mW cm(-3), demonstrating great potential for next-generation high-rate energy storage systems.
机译:已开发出一种简便且可扩展的一步阳极氧化方法,以在铜箔基板上制造三维(3-D)Cu(OH)(2)纳米多孔纳米棒,该产品可直接用作无粘合剂的电极用于超级电容器。纳米棒的独特形态为氧化还原反应提供了大量的活性位点,可以通过电解质离子轻松访问。得益于此,可获得213 mF cm(-2)的高电容,并具有出色的速率能力(将扫描速率提高到10倍时,电容保持率为62.3%)和出色的可循环性(5000次循环后,电容保持率为92.0%)。实现。另外,使用Cu(OH)(2)和活性炭分别作为正电极和负电极来组装柔性且可折叠的固态不对称超级电容器。该器件具有3.68 mW h cm(-3)的高能量密度和5314 mW cm(-3)的高功率密度,证明了下一代高速率储能系统的巨大潜力。

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