Self-assembled (NH4)2V7O16 hierarchical structures with improved electrochemical performance for aqueous Li-ion batteries

Herein, (NH4)2V7O16 hierarchical structures formed by the self-assembly of nanoflakes were successfully synthesized by a one-step rotating hydrothermal method. When utilized as anodic materials for aqueous Li-ion batteries, the obtained (NH4)2V7O16 exhibited good rate capability and excellent cyclic stability. Moreover, the structural evolution of the ammonium vanadium bronze during cycling was also investigated by ex situ XRD.