(NH4)2V10O25 .8H2O nanowire materials for stable zinc ion storage

To meet the growing electricity demand, it is important to develop emerging energy storage devices with high capacity and long cycle life. Aqueous zinc ion batteries (AZIBs) have attracted wide attention due to its characteristics of environment-friendliness and nonflammable electrolyte. However, the low energy density limits their further applications. In this work, we prepare (NH4)2V10O25. 8H2O nanowires through a simple water bath route. A series of button cells are assembled using the obtained samples as the cathode and 3 M Zn (CF3SO3)2 as electrolyte. They deliver a specific capacity of 421 mAh g-1 at a current density of 0.2 A g-1. It can provide a capacity of 245.0 mA h g-1 at 10 A g-1 with a capacity retention of 63% after 5000 cycles, revealing their potential applications in next generation energy storage devices.

Automated summary

To meet the increasing demand for electricity, it is crucial to develop energy storage devices with high capacity and long cycle life. Aqueous zinc ion batteries (AZIBs) have gained attention for their eco-friendly nature and nonflammable electrolyte. However, their limited energy density hampers their further applications. In this study, nanowires of (NH4)2V10O25. 8H2O were prepared using a simple water bath method, and button cells assembled with these nanowires as cathode exhibited promising performance, delivering a specific capacity of 421 mAh g-1 at a current density of 0.2 A g-1. At 10 A g-1, it provided a capacity of 245.0 mA h g-1 with a capacity retention of 63% after 5000 cycles, indicating their potential applications in future energy storage devices.