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

Abstract

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.