VO₂ as a potential type of cathode material for aqueous Zn-ion batteries (AZIBs) has attracted increasing interest over the past few years, owing to the various oxidation states of vanadium and unique tunnel transport pathway. However, the major challenge for VO₂ is the absence of a high-capacity and stable structure because of the slow electron transport kinetics and the collapsible crystal structure. Herein, an ultra-long life H-doped VO₂ is obtained by an efficient chelation reaction with ascorbic acid (AA). Benefiting from the H-doped, the crystallinity of VO₂ is reduced, and the oxygen vacancies and electron conductivity in VO₂ are enhanced, which is also confirmed by the calculated results of Density Functional Theory (DFT). Based on the H-doped VO₂ (AA-VO₂), ultra-long 22,000 cycles at 10 A g⁻¹ are obtained as well as high specific capacity (572 mAh g⁻¹) and energy density (443 Wh kg⁻¹) at 0.2 A g⁻¹. By contrast, the AZIBs with untreated VO₂ exhibit only 251 mAh g⁻¹ specific capacity and 235 Wh kg⁻¹ energy density. And the batteries can work no more than 2000 cycles. Therefore, this H-doped VO₂ by chelation with AA is a promising cathode material for high performance aqueous zinc-ion batteries.

由于钒的各种氧化态和独特的隧道传输途径， VO ₂作为一种潜在的水系锌离子电池（AZIBs）正极材料在过去几年中引起了越来越多的兴趣。然而，VO ₂面临的主要挑战是由于缓慢的电子传输动力学和可塌陷的晶体结构，缺乏高容量和稳定的结构。在此，通过与抗坏血酸（AA）的有效螯合反应获得了超长寿命的H掺杂VO _{2 。}受益于H掺杂，VO 2 的结晶度降低，VO _2中的氧空位和电子电导率降低增强，密度泛函理论（DFT）的计算结果也证实了这一点。基于H掺杂的VO ₂ (AA-VO _{2 )，在10 A g} ^-1下获得22,000次超长循环以及高比容量(572 mAh g ^-1 )和能量密度(443 Wh kg ^-1 ) 在 0.2 A g ^-1。相比之下，具有未经处理的 VO ₂的 AZIB仅表现出 251 mAh g ^-1比容量和 235 Wh kg ^-1能量密度。电池可以工作不超过 2000 次循环。因此，这种与AA螯合的H掺杂VO ₂是一种很有前途的高性能水系锌离子电池正极材料。