Alkali ion doping in ammonium vanadate nanoflowers for superior aqueous zinc-ion batteries

Alkali metal ion (Na + , K + ) doping enhances (NH 4 ) 2 V 6 O 16 nanoflowers for AZIBS via synergistic interlayer, defect, and morphological engineering. The optimized NaNVO exhibits 585 mAh g −1 at 0.2 A g −1 and 87% retention over 4000 cycles at 10 A g −1 .