Recent Progress of Liquid Metal-Based Electromagnetic Shielding Materials

Area of Science:

• Materials Science
• Condensed Matter Physics
• Electrical Engineering

Background:

• Electromagnetic shielding materials are crucial for human health and information security.
• Growing demands necessitate novel materials for effective electromagnetic radiation suppression.
• Liquid metals (LM) possess unique properties like high conductivity and fluidity, making them promising for electromagnetic shielding.

Purpose of the Study:

• To review and synthesize recent advancements in liquid metal-based electromagnetic shielding materials.
• To clarify the classification of liquid metals and the principles of electromagnetic shielding.
• To identify current challenges and future research directions in the field.

Main Methods:

• Systematic literature review of liquid metal electromagnetic shielding.
• Classification of liquid metals and electromagnetic shielding fundamentals.
• Analysis of research based on four key design motifs: monolithic LM scaffolds, LM/conductive-filler blends, LM/magnetic particle composites, and architectured multifunctional architectures.

Main Results:

• Liquid metals demonstrate significant potential for electromagnetic shielding applications.
• Four primary design strategies for LM-based shields have been identified and analyzed.
• Recent research highlights progress in developing novel LM-based shielding solutions.

Conclusions:

• Liquid metal-based materials offer a promising pathway for advanced electromagnetic shielding.
• Future development should focus on achieving ultra-lightweight, broadband, and intelligent LM electromagnetic shields.
• Addressing current bottlenecks is essential for realizing the full potential of LM electromagnetic shielding technology.