Ultrasonic liquid-phase catalysis for enhanced power generation in Al-based bioelectrolyte batteries

Area of Science:

• Materials Science
• Electrochemistry
• Acoustics

Background:

• Aluminum-based batteries (ABBBs) offer biocompatible power for wearables using bioelectrolytes like sweat.
• Key limitations include slow mass transfer and reaction kinetics at electrode interfaces.

Purpose of the Study:

• To develop an ultrasound-catalyzed ABBB to overcome interfacial kinetic limitations.
• To enhance the performance of ABBBs for practical biofluid-powered applications.

Main Methods:

• Utilized synergistic effects of acoustic pressure, streaming, and stirring for liquid-phase catalysis.
• Investigated catalysis mechanisms at the electrode-electrolyte interface.
• Tested battery performance using artificial sweat as the electrolyte.

Main Results:

• Ultrasound catalysis dramatically improved battery discharge performance.
• Peak power output increased by over 10-fold compared to non-catalyzed batteries.
• Power output with artificial sweat electrolyte enhanced approximately 5-fold under ultrasonic excitation.

Conclusions:

• A novel physical-field catalytic strategy effectively boosts ABBB performance.
• Ultrasound catalysis is a viable method for enhancing biofluid-powered systems.
• This technology supports applications in self-powered biosensors and wearable medical devices.