The Full-Graphdiyne-Based Fast-Charging Aqueous Zinc Ion Battery Toward Synergistically Boosted Capacity and Long Lifespan.

Abstract

The practical application of rechargeable aqueous zinc ion batteries (AZIBs) is severely hindered by their poor stability, sluggish kinetics, and limited specific capacity. Based on the synergetic effect of trifluoro-substituted graphdiyne (3F-GDY), a full-graphdiyne-based AZIB is designed that achieves simultaneous regulation of cathodic and anodic electrochemical performance with enhanced lifespan, capacity, and fast-charging property. 3F-GDY@Zn||3F-GDY@NVO full cell exhibits specific capacity of 486.0 mA h g-1 at current density of 0.1 A g-1 with stable cycling performance of over 4000 cycles at 1 A g-1, 7000 cycles at 5 A g-1 and 10000 cycles at 10 A g-1.The synergetic effects of 3F-GDY for AZIBs are further investigated via electrochemical and ex situ characterization techniques, as 3F-GDY possesses porous structure, strong interaction between F atoms and zinc ions, and robust strength. These results bring new perspectives to the fabrication of high-performance AZIBs.