Enhanced Conductivity in Highly Stretchable Silver and Polymer Nanocomposite Conductors

Area of Science:

• Materials Science
• Nanotechnology
• Electrical Engineering

Background:

• Stretchable conductors face a trade-off between conductivity and stretchability.
• High conductivity is crucial for wearable and mobile electronic applications.

Purpose of the Study:

• To develop a highly conductive and stretchable conductor for electronic applications.
• To investigate the impact of silver (Ag) microparticle and nanoparticle ratios on material properties.

Main Methods:

• Fabrication of a stretchable conductor using Ag flat-type microparticles, Ag nanoparticles, and a polyester binder.
• Intense pulse light (IPL) sintering technique for conductor processing.
• Analysis of varying Ag particle ratios on dispersibility, printability, conductivity, and stretchability.

Main Results:

• Increased Ag flat-type particle content enhanced dispersibility, printability, and conductivity.
• Achieved outstanding conductivity of 5.5×10^6 S/m.
• Higher Ag nanoparticle content improved stretchability up to 210% at 30% nanoparticle loading.
• Demonstrated exceptional durability with 2,600 stretching cycles at 50% strain and 10,000 folding cycles.

Conclusions:

• The developed Ag composite conductor effectively overcomes the conductivity-stretchability trade-off.
• The material shows significant potential for durable and high-performance flexible electronic devices.
• IPL sintering is a viable method for producing high-performance stretchable conductors.