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

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Rechargeable aqueous zinc ion batteries (AZIBs) face limitations in stability, kinetics, and capacity, hindering practical use.
• Developing advanced electrode materials is crucial for overcoming these challenges in AZIB technology.

Purpose of the Study:

• To design a full-graphdiyne-based AZIB utilizing the synergetic effects of trifluoro-substituted graphdiyne (3F-GDY).
• To simultaneously enhance cathodic and anodic electrochemical performance, including lifespan, capacity, and fast-charging properties.

Main Methods:

• Fabrication of a full cell using 3F-GDY@Zn anode and 3F-GDY@NVO cathode.
• Electrochemical characterization including specific capacity measurements at various current densities.
• Ex situ characterization techniques to investigate the synergetic effects of 3F-GDY.

Main Results:

• The 3F-GDY@Zn||3F-GDY@NVO full cell achieved a specific capacity of 486.0 mA h g⁻¹ at 0.1 A g⁻¹.
• Demonstrated exceptional cycling stability: over 4000 cycles at 1 A g⁻¹, 7000 cycles at 5 A g⁻¹, and 10000 cycles at 10 A g⁻¹.
• 3F-GDY exhibited a porous structure, strong F-ion interaction, and robust mechanical strength, contributing to performance enhancement.

Conclusions:

• The synergetic effects of 3F-GDY are key to improving AZIB performance.
• This study offers new strategies for fabricating high-performance AZIBs with enhanced stability and fast-charging capabilities.