Abstract Rechargeable aqueous zinc-ion battery is a promising energy storage device because of its low cost and high safety. However, they are still in their infancy due to the limited choice of cathodes with high capacity and satisfactory cycling performance. In this work, porous V2O5 materials were obtained by pyrolysis of vanadium-MOF and adopted as intercalation cathode for aqueous zinc-ion batteries. V2O5 purchased commercially as a control, the effects of specific surface area, pore size distribution and mixed valence of electrodes on the performance of batteries were studied. The novel cathode delivers high capacities of 300 mA h g−1 compared to 60 mAh g−1 for C-V2O5 at current density of 100 mA g−1. The energy density of this Zn ion battery is about 230 Wh kg−1, which is much higher than commercial lead acid batteries. The capacity of P-V2O5 electrode retains 120 mA h g−1 even at 2000 mA g−1, which is much higher than that of C-V2O5. Moreover, the structure of V2O5 nanoplates and their composites with carbon materials can improve the cyclic stability.

中文翻译：

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V-MOF 衍生的多孔 V2O5 纳米板用于高性能水性锌离子电池

摘要 可充电水系锌离子电池具有成本低、安全性高等优点，是一种很有前景的储能装置。然而，由于具有高容量和令人满意的循环性能的正极的选择有限，它们仍处于起步阶段。在这项工作中，通过钒-MOF 的热解获得多孔 V2O5 材料，并将其用作水系锌离子电池的插层阴极。以市售的 V2O5 作为对照，研究了电极的比表面积、孔径分布和混合价对电池性能的影响。与 C-V2O5 在 100 mA g-1 的电流密度下的 60 mAh g-1 相比，新型阴极提供 300 mAh g-1 的高容量。这种锌离子电池的能量密度约为 230 Wh kg-1，远高于商用铅酸电池。P-V2O5 电极的容量即使在 2000 mA g-1 下仍保持 120 mA h g-1，远高于 C-V2O5。此外，V2O5 纳米片的结构及其与碳材料的复合材料可以提高循环稳定性。