Enhancing the hydrogen ion adsorption capacity to improve the performance of an aqueous zinc ion battery of V2O5

• Published in: Inorganic chemistry communications 2024-03, Vol.161, p.112053, Article 112053
• Main Authors: Lv, Chen-meng, Bao, Lin-yan, Huo, Yu-qiu, Liu, Yue, Su, Zhong-min
• Format: Article
• Language: English
• Subjects: Aqueous zinc ion battery; Hydrogen ion adsorption capacity; Mechanism; Ni-V2O5
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2024.112053

In this paper, the influence of the hydrogen ion adsorption capacity of cathodes on the performance of aqueous zinc ion batteries is discussed by comparing V2O5 before and after doping Ni atoms. The results exhibit that the stronger the hydrogen ion capture ability, the better the charge–discharge performance, the rate performance and the cycle stability, which provides a new insight for the in-depth study of the charging-discharging mechanism. [Display omitted] •The effect of H+ ion adsorption capacity on the performance of AZIBs is discussed.•The stronger H+ ion adsorption capacity, the better AZIB performance.•The specific capacity of Zn//Ni-V2O5 battery is 313 mA h g−1 at 0.5 A g−1.•The Zn//Ni-V2O5 battery exhibits an energy density of 240 Wh kg−1 at 0.5 A g−1.•The DFT results are coincide with the experimental results. In acidic aqueous zinc-ion batteries (AZIBs), the insertion and escape of zinc ions are always accompanied by hydrogen ions, but the effect of hydrogen ion adsorption capacity on the performance of zinc-ion batteries has hardly been discussed. Herein, a sea urchin-like Ni-V2O5 is obtained to estimate the effect of hydrogen ion adsorption capacity. Due to the interaction of nickel with oxygen, Ni-V2O5 exhibits an excellent hydrogen ion adsorption capacity compared to pristine V2O5. The improvement in hydrogen ion adsorption capacity directly optimizes the charge and discharge performance of AZIB. The Zn//Ni-V2O5 battery exhibits a specific capacity of 313 mA h g−1 and a high energy density of 240 Wh kg−1 at 0.5 A g−1. This provides a new viewpoint for the charging and discharging mechanism of AZIBs.