Separator Design for High-Performance Aqueous Zinc-Ion Batteries: Recent Advances and Future Outlooks

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Aqueous zinc-ion batteries (AZIBs) offer safe, cost-effective, large-scale energy storage but face challenges like dendrite formation and cathode dissolution.
• The separator is crucial for AZIB performance, influencing ion transport, interface stability, and dendrite suppression.

Purpose of the Study:

• To provide a comprehensive review of recent separator modification strategies for AZIBs.
• To analyze how these modifications impact battery performance and address key challenges.
• To bridge the gap between fundamental research and practical applications of separator engineering in AZIBs.

Main Methods:

• Review of literature on separator modification techniques, including surface functionalization, porous structure regulation, and composite matrix design.
• Analysis of mechanisms underlying separator modifications' effects on ion transport, interface stability, and dendrite suppression.
• Exploration of separator engineering technologies with practical application potential.

Main Results:

• Separator modification strategies significantly enhance ion transport, interface stability, and dendrite suppression in AZIBs.
• Surface functionalization, porous structure control, and composite matrix design are effective approaches.
• Engineered separators show promise for improving cycle life and overall battery performance.

Conclusions:

• Separator engineering is a critical pathway for enhancing AZIB performance and enabling industrial-scale applications.
• Understanding structure-property relationships of separator materials guides the rational design of next-generation separators.
• Advanced separator technology is essential for the practical deployment of zinc-based energy storage solutions.