Wisconsin Alumni Research Foundation

Clean Technology
Clean Technology
WARF: P210044US02

Inventors: Xudong Wang, Yutao Dong

The Invention
UW-Madison researchers have developed a transient biodegradable battery with a filament structure that limits the speed of reaction allowing for a longer battery lifetime with controlled output. The filament is constructed of zinc microparticles with a thin chitosan/Al2O3 double-shell outer insulation. A nick on one end of the filament leads to sequential dissolution that serves to control the discharging lifetime by decreasing filament length. The discharge current and battery lifespan can be controlled by adjusting the exposed cross-sectional area of the zinc microparticle core and the length of the filament, respectively. Multiple filaments can also be integrated in series or parallel. A prototype single filament was able to deliver stable voltage of 0.55 V lasting 80 hours at a discharging current of 0.01 mA. This novel structure provides improved control of biodegradable battery life/power output and is a promising solution to power transient medical implants.
Medical Implants
Drug Delivery Systems
Glucose Sensors
Endoscopy Capsules
Veterinary Devices
Key Benefits
Good flexibility of material
Well controlled dissolution direction and rate
Ability to design to a variety of operation times
Additional Information
For More Information About the Inventors
For current licensing status, please contact Michael Carey at [javascript protected email address] or 608-960-9867