Rechargeable aqueous zinc ion batteries based on vanadium oxides have been increasingly studied because of the low cost and high safety. However, the performance of V-based cathodes is limited mainly due to the strong interaction between intercalated zinc ions and the host structure, low electronic conductivity, phase transitions and unstable architectures upon cycling. Here, strain engineering of vanadium oxide, through oxygen vacancy and phosphate group coordination, is developed. The layered structure of vanadium oxide distorts due to the localized strain to form a “cavity”, which contributes to the abundant zinc-ion storage sites and weakens the strong interaction. The introduced oxygen defects and phosphate groups also boost charge transfer and increase the electronic conductivity of the cathode. More importantly, due to the repulsive force between the phosphate groups and OH⁻, the phase transitions on the cathode surface during cycling is impeded, resulting in the stable architecture. Thus, the prepared cathode exhibits a high capacity of 161.8 mA h g⁻¹ at 10 A g⁻¹, a long cycle life (96.8% capacity retention after 3000 cycles) and an outstanding rate performance (124.3 mA h g⁻¹ at 20 A g⁻¹). This strain engineering may provide a rational construction to promote the capacity and durability of cathodes for other advanced batteries.

基于钒氧化物的可充电水性锌离子电池由于成本低、安全性高而受到越来越多的研究。然而，V基正极的性能受到限制，主要是由于嵌入的锌离子与主体结构之间的强相互作用、低电子电导率、相变和循环时的不稳定结构。在这里，通过氧空位和磷酸基团配位开发了氧化钒的应变工程。由于局部应变，氧化钒的层状结构扭曲形成“空腔”，这有​​助于丰富的锌离子存储位点并削弱强相互作用。引入的氧缺陷和磷酸盐基团也促进了电荷转移并增加了阴极的电子电导率。更重要的是，^-，循环过程中阴极表面的相变受到阻碍，导致结构稳定。因此，所制备的正极在 10 A g ^-1时具有161.8 mAh g ^-1的高容量、长循环寿命（3000 次循环后容量保持率为 96.8%）和出色的倍率性能（20 A g ^{-1 时}为124.3 mAh g ^{-1 -1} )。这种应变工程可以提供一种合理的结构，以提高其他先进电池正极的容量和耐用性。