Nickel@Nickel Oxide Dendritic Architectures with Boosted Electrochemical Reactivity for Aqueous Nickel–Zinc Batteries,ChemElectroChem

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Nickel@Nickel Oxide Dendritic Architectures with Boosted Electrochemical Reactivity for Aqueous Nickel–Zinc Batteries
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-09-25 , DOI: 10.1002/celc.202001112
Fuxin Wang ₁ , Yongzhuang Lu ₂ , Siqi Zeng ₂ , Yin Song ₂ , Dezhou Zheng ₂ , Wei Xu ₂ , Xihong Lu ₃

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Rechargeable alkaline zinc‐ion batteries (ZIBs) have gained extensive attention on account of their inexpensiveness, and high levels of safety and output voltage, but the lack of suitable cathode materials with high energy storage property and long cycle stability limits further development of ZIBs. Herein, we report an effective two‐step electrochemical approach to prepare Ni@NiO core‐shell dendritic architectures as cathode material for rechargeable alkaline ZIBs. Benefiting from the highly active NiO shell and unique core‐shell structure, this Ni@NiO electrode shows an excellent discharge capacity (0.112 mAh cm⁻², at 4 mA cm⁻²) and a high rate capability (63.7 % capacity retention at 40 mA cm⁻²). Furthermore, the alkaline ZIBs with this Ni@NiO cathode also displays a high energy density of 0.193 mWh cm⁻² and a remarkable power density of 65.0 mW cm⁻².

中文翻译：

水性镍锌电池具有增强的电化学反应性的镍@氧化镍树枝状结构

可充电碱性锌离子电池（ZIB）由于其价格便宜，安全性和输出电压高而受到了广泛的关注，但是缺乏合适的具有高能量存储性能和长循环稳定性的正极材料限制了ZIBs的进一步发展。在此，我们报告了一种有效的两步电化学方法，以制备Ni @ NiO核壳树突状结构作为可充电碱性ZIBs的阴极材料。受益于高活性的NiO外壳和独特的核壳结构，该Ni @ NiO电极显示出出色的放电容量（0.112 mAh cm ^-2，在4 mA cm ^-2时）和高倍率容量（在40℃时保持63.7％的容量） mA cm ^-2）。另外，通过该镍@的NiO阴极碱性ZIBs还显示的0.193厘米mWh的高能量密度^-2和65.0毫瓦厘米的一个显着的功率密度^-2。

更新日期：2020-11-17

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