Replacing traditional batteries in wearable electronics

Researchers at Queensland University of Technology (QUT) have advanced the use of carbon nanotubes in wearable electronics by developing a new molecular strategy to enhance their efficiency. Carbon nanotubes, known for their elasticity and electrical conductivity, have long been considered promising for smart wearables, but their tendency to clump together has posed significant challenges. The QUT team has now addressed this issue, setting a new standard for materials that convert heat into electricity.

Lead author Shanshan Zhou, a PhD student, explained that the team adopted a novel approach to tackle the adhesion of carbon nanotubes, a persistent problem in the field. This innovative method, characterized by its flexibility, can be applied broadly to create thermal energy harvesting materials with improved efficiency. The research has achieved record-breaking thermal power efficiency, exceeding long-standing benchmarks.

Professor Zhi-Gang Chen, Director of the Centre for Zero-Emission Power Development Research toward Carbon Neutrality at the Research Council of Australia, highlighted the impact of the new molecular structure on nanotube interactions. By using specially designed molecules, the research team maintained spacing between nanotubes without affecting their conductivity. This advancement has led to the creation of a flexible device that generates electricity from body heat, demonstrating durability through extensive bending and folding tests.

Professor Chen further noted the potential of this technology to replace traditional batteries in wearable devices. Applications could include health-tracking sensors, smart clothing, and other wearables that continuously harvest energy from body heat. Additionally, the technology may be applied in industrial waste heat recovery, flexible sensors, the Internet of Things (IoT), and next-generation sustainable electronics. The findings were published in the journal Angewandte Chemie International Edition.