Controlling morphology, adopting metal cations and introducing crystal water are three effective strategies to improve the electrochemical performance of various battery electrodes. However, the effects of simultaneously applying these three strategies to aqueous rechargeable zinc batteries (ARZBs) are rarely demonstrated. Herein, hierarchical H₁₁Al₂V₆O_23.2 (HAVO) microspheres were successfully prepared using a simple hydrothermal method, and used as cathode material for ARZBs. The as‐prepared HAVO microspheres exhibited superior electrochemical performance than the dehydrated AlV₃O₉ (AVO) microspheres, i. e. they have a larger specific capacity of 390.4 mA h g⁻¹ at 100 mA g⁻¹, a better rate capability of 191.4 mA h g⁻¹ at 5000 mA g⁻¹ and a higher cycling stability of up to 1000 cycles with a capacity retention of 80.9 %. The excellent electrochemical performance of HAVO is due to the synergistic effects of the shortened ion diffusion distance in primary HAVO nanosheets, the improved electronic conductivity, and structural stability by adopting Al³⁺ into the lattice, the enhanced charge transfer properties and ion diffusion coefficient of the electrode due to the existence of crystal water. Therefore, this work may offer a new route for the design and synthesis of more advanced electrode materials for ARZBs.

中文翻译：

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带有结构水的分层钒酸铝微球：水性可充电锌电池的高性能阴极材料。

控制形态，采用金属阳离子和引入结晶水是提高各种电池电极的电化学性能的三种有效策略。但是，很少展示将这三种策略同时应用于水性可充电锌电池（ARZB）的效果。在此，使用简单的水热法成功制备了分级的H ₁₁ Al ₂ V ₆ O _23.2（HAVO）微球，并将其用作ARZBs的阴极材料。所制备的HAVO微球比脱水的AlV ₃ O ₉（AVO）微球具有更好的电化学性能，即。e。它们具有390.4 mA h g ^-1的较大比电容在100mA克^-1，的191.4毫安ħ克更好的速率能力^-1在5000毫安克^-1和至多更高的循环稳定性至1000个循环的80.9％的容量保持率。HAVO优异的电化学性能归因于以下作用的协同效应：缩短在初级HAVO纳米片中的离子扩散距离，改善的电子电导率以及通过将Al ³⁺引入晶格中的结构稳定性，增强的电荷转移特性和离子扩散系数电极由于存在结晶水。因此，这项工作可能为ARZB的更高级电极材料的设计和合成提供一条新途径。