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首页> 外文期刊>Advanced Functional Materials >Nickel@Nickel Oxide Core-Shell Electrode with Significantly Boosted Reactivity for Ultrahigh-Energy and Stable Aqueous Ni-Zn Battery
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Nickel@Nickel Oxide Core-Shell Electrode with Significantly Boosted Reactivity for Ultrahigh-Energy and Stable Aqueous Ni-Zn Battery

机译：镍@氧化镍核壳电极，可显着提高反应性，可用于超高能和稳定的Ni-Zn水性电池

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摘要

The main bottlenecks of aqueous rechargeable Ni-Zn batteries are their relatively low energy density and poor cycling stability, mainly arising from the low capacity and inferior reversibility of the current Ni-based cathodes. Additionally, the complicated and difficult-to-scale preparation procedures of these cathodes are not promising for large-scale energy storage. Here, a facile and cost-effective ultrasonic-assisted strategy is developed to efficiently activate commercial Ni foam as a robust cathode for a high-energy and stable aqueous rechargeable Ni-Zn battery. 3D Ni@NiO core-shell electrode with remarkably boosted reactivity and an area of 300 cm(2) is readily obtained by this ultrasonic-assisted activation method (denoted as SANF). Benefiting from the in situ formation of electrochemically active NiO and porous 3D structure with a large surface area, the as-fabricated SANF//Zn battery presents ultrahigh capacity (0.422 mA h cm(-2)) and excellent cycling durability (92.5% after 1800 cycles). Moreover, this aqueous rechargeable SANF//Zn battery achieves an impressive energy density of 15.1 mW h cm(-3) (0.754 mW h cm(-2)) and a peak power density of 1392 mW cm(-3), outperforming most reported aqueous rechargeable energy-storage devices. These findings may provide valuable insights into designing large-scale and high-performance 3D electrodes for aqueous rechargeable batteries.
机译：含水可再充电Ni-Zn电池的主要瓶颈是其相对较低的能量密度和较差的循环稳定性，这主要是由于目前的Ni基阴极的容量低和可逆性差引起的。另外，这些阴极的复杂且难以规模化的制备过程对于大规模的能量存储没有希望。在此，开发了一种简便且经济高效的超声辅助策略，以有效地激活商用镍泡沫作为高能，稳定的水性镍-锌水溶液的坚固阴极。通过这种超声辅助激活方法（表示为SANF）可以轻松获得3D Ni @ NiO核壳电极，具有显着增强的反应性和300 cm（2）的面积。得益于原位形成的电化学活性NiO和具有大表面积的多孔3D结构，制成的SANF // Zn电池具有超高容量（0.422 mA h cm（-2））和出色的循环耐久性（92.5％后1800个周期）。此外，这种SANF // Zn水性可充电电池实现了令人印象深刻的15.1 mW h cm（-3）（0.754 mW h cm（-2））的能量密度和1392 mW cm（-3）的峰值功率密度。报告了水性可充电储能设备。这些发现可能为设计用于水性可充电电池的大型高性能3D电极提供有价值的见解。

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  • 来源
    《Advanced Functional Materials》 |2018年第29期|1802157.1-1802157.8|共8页
  • 作者

    Wang Rui; Han Yi; Wang Zifan; Jiang Jiuxing; Tong Yexiang; Lu Xihong;

  • 作者单位

    Sun Yat Sen Univ, Key Lab Bioinorgan & Synthet Chem, Key Lab Low Carbon Chem & Energy Conservat Guangd, MOE,KLGHEI Environm & Energy Chem,Sch Chem, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Key Lab Bioinorgan & Synthet Chem, Key Lab Low Carbon Chem & Energy Conservat Guangd, MOE,KLGHEI Environm & Energy Chem,Sch Chem, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Key Lab Bioinorgan & Synthet Chem, Key Lab Low Carbon Chem & Energy Conservat Guangd, MOE,KLGHEI Environm & Energy Chem,Sch Chem, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Key Lab Bioinorgan & Synthet Chem, Key Lab Low Carbon Chem & Energy Conservat Guangd, MOE,KLGHEI Environm & Energy Chem,Sch Chem, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Key Lab Bioinorgan & Synthet Chem, Key Lab Low Carbon Chem & Energy Conservat Guangd, MOE,KLGHEI Environm & Energy Chem,Sch Chem, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Key Lab Bioinorgan & Synthet Chem, Key Lab Low Carbon Chem & Energy Conservat Guangd, MOE,KLGHEI Environm & Energy Chem,Sch Chem, Guangzhou 510275, Guangdong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    activation; core-shell electrodes; high-energy; Ni-Zn batteries; rechargeable;

    机译：活化;核壳电极;高能;镍锌电池;可充电;

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