Dual-Network Structured Hydrogel Electrolytes Engaged Solid-State Rechargeable Zn-Air/Iodide Hybrid Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Electrolytes are crucial for battery performance, influencing ion transport and interface chemistry.
• Developing stable and efficient electrolytes is key for advancing battery technologies like solid-state zinc-air/iodide systems.

Purpose of the Study:

• To develop a novel dual-network hydrogel electrolyte for solid-state zinc-air/iodide hybrid batteries.
• To enhance the mechanical strength, ionic conductivity, and interface stability of the battery system.

Main Methods:

• Fabrication of a dual-network hydrogel electrolyte using polyacrylamide (PAM), sodium alginate (SA), and potassium iodide (KI).
• Assembly and testing of solid-state zinc-air/iodide hybrid batteries utilizing the developed hydrogel electrolyte.
• Characterization of the electrolyte's structure, ion transport properties, and electrochemical performance.

Main Results:

• The assembled hybrid battery demonstrated excellent renewability and a long cycling life of 110 hours with 80% energy efficiency.
• The ion-crosslinked dual-network structure improved mechanical strength and ionic conductivity.
• Introduction of iodine species optimized cathodic kinetics and zinc-ion solvation for enhanced interface stability.

Conclusions:

• The developed hydrogel electrolyte offers a promising solution for high-performance solid-state energy devices.
• This work presents significant concepts for designing novel solid-state electrolytes for advanced battery technologies.