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Zn-doped NiMoO4 enhances the performance of electrode materials in aqueous rechargeable NiZn batteries
Nanoscale ( IF 5.8 ) Pub Date : 2024-09-10 , DOI: 10.1039/d4nr02822h
Xingyan Zhang 1 , Dag Noréus 1
Affiliation  

In this work, zinc was introduced to prepare Ni1−xZnxMoO4 (0 ≤ x ≤ 1) nanoflake electrodes to increase the energy density and improve the cycling stability for a wider range of applications of aqueous rechargeable nickel–zinc (NiZn) batteries. This was achieved using a facile hydrothermal method followed by thermal annealing, which can be easily scaled up for mass production. Owing to the unique nanoflake structures, improved conductivity, and tunable electronic interaction, excellent electrochemical performance with high specific capacitance and reliable cycling stability can be achieved. When the Zn doping is 25%, the Ni0.75Zn0.25MoO4 nanoflake electrode displays a high specific capacitance of 345.84 mA h g−1 (2490 F g−1) at a current density of 1 A g−1 and improved cycling stability at a high current density of 10 A g−1. NiZn cells assembled with Ni0.75Zn0.25MoO4 nanoflake electrodes and zinc electrodes have a maximum specific capacity of 344.7 mA h g−1 and an energy density of 942.53 W h kg−1. This design strategy for nickel-based electrode materials enables high-performance energy storage and opens up more possibilities for other battery systems in the future.

中文翻译:


Zn 掺杂 NiMoO4 增强了水系可充电 NiZn 电池中电极材料的性能



在这项工作中,引入锌来制备 Ni1−xZnxMoO4 (0 ≤ x ≤ 1) 纳米片状电极,以提高能量密度并提高循环稳定性,适用于水性可充电镍锌 (NiZn) 电池的更广泛应用。这是通过一种简单的水热方法,然后是热退火来实现的,热退火可以很容易地扩大规模以进行大规模生产。由于独特的纳米片状结构、改进的导电性和可调的电子相互作用,可以实现优异的电化学性能、高比电容和可靠的循环稳定性。当 Zn 掺杂为 25% 时,Ni0.75Zn0.25MoO4 纳米片电极在 1 A g-1 的电流密度下显示出 345.84 mA h g-1 (2490 F g-1) 的高比电容,并在 10 A g-1 的高电流密度下表现出更好的循环稳定性。用 Ni0.75Zn0.25MoO4 纳米片状电极和锌电极组装的 NiZn 电池的最大比容量为 344.7 mA h g-1,能量密度为 942.53 W h kg-1。这种镍基电极材料的设计策略实现了高性能的储能,并为未来的其他电池系统开辟了更多的可能性。
更新日期:2024-09-10
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