Rechargeable aqueous zinc-ion batteries (RAZIBs) are considered promising energy storage system for large-scale applications due to their advantages of low cost, inherent safety, and environmental friendliness. Developing advanced cathode materials with stable cycle performance is the major focus in this field. However, relationships between electrolyte components and battery performance are not fully understood. In the present work, Zn(TFSI)₂ aqueous electrolyte is demonstrated to provide enhanced electrochemical performance of Zn_0.17V₂O₅•0.95H₂O (ZVO) cathode, that is, high capacity (390 mAh g⁻¹ at 1 A g⁻¹) and stable cycle performance (77.7% after 6,000 cycles at 6 A g⁻¹) can be achieved. By contrast, ZVO in ZnSO₄ electrolyte exhibits comparable discharge capacity initially (355 mAh g⁻¹ at 1 A g⁻¹), but the cycle performance is much deteriorated (20.4% after 6,000 cycles at 6 A g⁻¹). As examined by X-ray Diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical impedance spectroscopy (EIS), the results indicate that using Zn(TFSI)₂ aqueous electrolyte reduces surface precipitation allowing boosted ions diffusion kinetics in ZVO host material upon charging, resulting in highly reversible energy storage. Moreover, another crystal structure (one-dimensional tunneled V₂O₅) also demonstrates the superior performance enabled by Zn(TFSI)₂ electrolyte.

可充电水性锌离子电池（RAZIBs）由于其成本低、固有安全性和环境友好性等优点，被认为是用于大规模应用的有前途的储能系统。开发具有稳定循环性能的先进正极材料是该领域的主要焦点。然而，电解质成分与电池性能之间的关系尚未完全了解。在目前的工作中，Zn(TFSI) ₂水性电解质被证明可以提高 Zn _0.17 V ₂ O ₅ •0.95H ₂ O (ZVO) 阴极的电化学性能，即高容量（390 mAh g ^-1 at 1 A克^-1) 和稳定的循环性能（6 A g ^{-1 下}6,000 次循环后为 77.7% ）。相比之下，ZnSO ₄电解液中的ZVO最初表现出相当的放电容量（1 A g ^-1时为355 mAh g ^-1），但循环性能大大恶化（6 A g ^{-1 下}6,000 次循环后 20.4% ）。通过X射线衍射 (XRD)、扫描电子显微镜 (SEM)、X射线光电子能谱 (XPS) 和电化学阻抗谱 (EIS) 检查，结果表明使用 Zn(TFSI) ₂水性电解质减少了表面沉淀，从而在充电时提高了 ZVO 主体材料中的离子扩散动力学，从而实现了高度可逆的能量存储。此外，另一种晶体结构（一维隧道 V ₂ O ₅）也证明了 Zn(TFSI) ₂电解质带来的优异性能。