A multifunctional imidazole-based binder for high-performance aqueous Zn-I₂ batteries

Area of Science:

• Electrochemistry
• Materials Science
• Energy Storage

Background:

• Polyiodide shuttling is a major challenge in aqueous zinc-iodine (Zn-I2) batteries, hindering performance and lifespan.
• Effective electrolyte infiltration is crucial for high-performance battery operation.

Purpose of the Study:

• To design a novel binder that suppresses polyiodide shuttling.
• To enhance electrolyte infiltration for improved battery performance.
• To enable shuttle-free and high-performance aqueous Zn-I2 batteries.

Main Methods:

• Design and synthesis of a multifunctional imidazole-based binder.
• Integration of the binder into aqueous Zn-I2 battery systems.
• Electrochemical performance testing, including cycling stability and rate capability.

Main Results:

• The novel binder effectively suppressed polyiodide shuttling.
• Enhanced electrolyte infiltration was observed.
• The developed batteries demonstrated shuttle-free operation and high performance.

Conclusions:

• The imidazole-based binder is a promising solution for overcoming polyiodide shuttling in aqueous Zn-I2 batteries.
• This approach significantly improves battery performance and stability.