Molybdenum trioxide (MoO₃) has been widely studied in the energy storage field due to its various phase states and unique structural advantages. Among them, lamellar α-phase MoO₃ (α-MoO₃) and tunnel-like h-phase MoO₃ (h-MoO₃) have attracted much attention. In this study, we demonstrate that vanadate ion (VO₃^-) can transform α-MoO₃ (a thermodynamically stable phase) to h-MoO₃ (a metastable phase) by altering the connection of [MoO₆] octahedra configurations. h-MoO₃ with VO₃^- inserted (referred to as h-MoO₃-V) as the cathode material for aqueous zinc ion batteries (AZIBs) exhibits excellent Zn²⁺ storage performances. The improvement in electrochemical properties is attributed to the open tunneling structure of the h-MoO₃-V, which offers more active sites for Zn²⁺ (de)intercalation and diffusion. As expected, the Zn//h-MoO₃-V battery delivers specific capacity of 250 mAh·g⁻¹ at 0.1 A·g⁻¹ and rate capability (73% retention from 0.1 to 1 A·g⁻¹, 80 cycles), well exceeding those of Zn//h-MoO₃ and Zn//α-MoO₃ batteries. This study demonstrates that the tunneling structure of h-MoO₃ can be modulated by VO₃^- to enhance the electrochemical properties for AZIBs. Furthermore, it provides valuable insights for the synthesis, development and future applications of h-MoO₃.

三氧化钼(MoO ₃ )由于其多种相态和独特的结构优势，在储能领域得到了广泛的研究。其中，层状α相MoO ₃（α -MoO ₃）和隧道状h相MoO ₃（h - MoO ₃）备受关注。在这项研究中，我们证明了钒酸根离子(VO ₃ ^- ) 可以_通过改变[ MoO ₆] 八面体构型。h -MoO ₃ with VO ₃ ^-插入（称为h -MoO ₃ -V）作为水性锌离子电池（AZIBs）的正极材料表现出优异的Zn ²⁺存储性能。电化学性能的改善归因于h -MoO ₃ -V 的开放隧道结构，它为 Zn ²⁺ (脱)嵌入和扩散提供了更多的活性位点。正如预期的那样，Zn// h -MoO ₃ -V 电池在 0.1 A·g ^{-1时提供 250 mAh·g -1}的比容量^{和倍率性能（从 0.1 到 1 A·g -1}保持 73% ，80 个循环），远远超过 Zn// h -MoO ₃和 Zn// α -MoO ₃电池。该研究表明， h -MoO ₃的隧道结构可以通过 VO ₃ ^-进行调节，以增强 AZIB 的电化学性能。此外，它为h -MoO ₃的合成、开发和未来应用提供了有价值的见解。