For cost and safety reasons, aqueous batteries are suitable for large-scale energy storage. Among all aqueous batteries, rechargeable aqueous zinc-ion batteries (ZIBs) are promising choices owing to the low equilibrium potential and high volumetric capacity of zinc. However, its development is also severely hindered by the limited available cathode materials, which generally display poor cycling capabilities. As one of the most investigated POVs (polyvanadates) today, (V₁₀O₂₈)⁶⁻ has been demonstrated to be feasible in energy storage rely on the well-defined structure and fascinating material activity. Herein, we propose a polyvanadate-Na₆V₁₀O₂₈ with (V₁₀O₂₈)⁶⁻ anion as a support structure and serve it for the first time as an aqueous ZIBs cathode. The high stability of the (V₁₀O₂₈)⁶⁻ cluster permits the material to tolerate the reversible (de)insertion of Zn²⁺. As a result, the Na₆V₁₀O₂₈ cathode delivers a high capacity of 279.5 mAh g⁻¹ after activation and an extraordinary lifespan over 2000 cycles. Furthermore, the pseudocapacitance analysis and GITT test reveal the pseudocapacitance behavior and high Zn²⁺ diffusion coefficient (10⁻¹⁰ cm² s⁻¹) of the Na₆V₁₀O₂₈/Zn cell, respectively. Not only that, ex-situ XRD, XPS, and TEM were also employed to analyze the storage mechanism of Zn²⁺, indicating the synergistic zinc-storage capacity of Na₆V₁₀O₂₈ and irreversible products. Overall, this work presents new insights into the application of Na₆V₁₀O₂₈ in aqueous ZIBs and also demonstrates the competitive potential of POVs for energy storage.

出于成本和安全原因，水系电池适用于大规模储能。在所有水系电池中，可充电水系锌离子电池（ZIBs）由于锌的低平衡电位和高体积容量而成为有前途的选择。然而，其发展也受到有限的可用正极材料的严重阻碍，这些材料通常表现出较差的循环能力。作为当今研究最多的 POV（多钒酸盐）之一，(V ₁₀ O ₂₈ ) ^6-已被证明在能量存储中是可行的，这依赖于明确的结构和迷人的材料活性。在此，我们提出了一种聚钒酸盐-Na ₆ V ₁₀ O ₂₈与 (V ₁₀ O₂₈ ) ^6-阴离子作为支撑结构，并首次将其用作水系 ZIBs 正极。_{(V 10} O ₂₈ ) ^6-簇的高稳定性允许材料耐受Zn ²⁺的可逆（脱）插入。因此，Na ₆ V ₁₀ O _{28正极在激活后提供了 279.5 mAh g} ^-1的高容量和超过 2000 次循环的非凡寿命。此外，赝电容分析和GITT测试揭示了赝电容行为和高Zn ²⁺扩散系数（10 ^-10 cm ² s ^-1) 分别为Na ₆ V ₁₀ O ₂₈ /Zn 电池。不仅如此，还采用非原位XRD、XPS和TEM分析了Zn ²⁺的储存机理，表明Na ₆ V ₁₀ O ₂₈和不可逆产物的协同储锌能力。_{总体而言，这项工作为 Na 6} V ₁₀ O ₂₈在水性 ZIBs 中的应用提供了新的见解，并展示了 POVs 在储能方面的竞争潜力。