Stretchable Ionic Conductors: Balancing Mechanical Properties and Ionic Conductivity

Area of Science:

• Materials Science
• Polymer Chemistry
• Electrochemical Engineering

Background:

• Stretchable ionic conductors (SICs) are crucial for soft electronics, bioelectronics, and flexible energy devices.
• Achieving a balance between ionic conductivity and mechanical robustness in solvent-free SICs remains a significant challenge.
• Durability and long-term stability are critical for practical applications of SICs.

Purpose of the Study:

• To review design strategies and key properties of stretchable ionic conductors.
• To focus on the interplay between mechanical performance and ion transport in SICs.
• To highlight promising approaches for optimizing SICs for next-generation stretchable devices.

Main Methods:

• Analysis of recent advances in elastomer-based SICs.
• Review of innovative strategies: dynamic cross-linking, supramolecular interactions, phase-separated networks.
• Examination of material architectures, cross-linking chemistry, and ion transport mechanisms.

Main Results:

• Emergence of promising SIC materials: poly(ionic liquid)-based elastomers (PILs), polymerizable deep eutectic solvents (PDESs), and dual-network ionogels.
• These materials offer high stretchability, tunable conductivity, and improved mechanical strength.
• Demonstrated potential for enhanced performance through specific design strategies.

Conclusions:

• Optimizing SICs requires a deep understanding of the relationship between material design and performance.
• Innovative strategies are paving the way for robust and highly conductive stretchable materials.
• Further research in material architecture and ion transport mechanisms will drive the development of advanced stretchable devices.