A research group headed by Dr. Sunghoon Hur from the Electronic and Hybrid Materials Research Center at the Korea Institute of Science and Technology (KIST) and Professor Hyun-Cheol Song from Korea University has created a biocompatible ultrasonic receiver that preserves its functionality even when flexed. The receiver addresses numerous constraints of current wireless power transmission techniques while enhancing biocompatibility, and is anticipated to be utilized in future wearable and implantable electronic devices. 

The researchers additionally showed that batteries can be wirelessly charged by capturing ultrasonic waves, marking a significant advancement in the commercialization of the technology.

The researchers significantly enhanced the power conversion efficiency relative to traditional ultrasonic receivers by employing high-efficiency piezoelectric materials and an innovative structural design. By creating a flexible and biocompatible ultrasonic receiver that fits snugly to the body’s contours while ensuring consistent power conversion, they managed to send 20 mW of power at a range of 3 cm underwater and 7 mW at a depth of 3 cm beneath the skin. This amount of power can continuously provide energy to low-power wearable gadgets or implantable medical devices.

The results are anticipated to promote the rapid commercialization of wireless charging technology based on ultrasound for underwater electronics and medical implants. Specifically, it is anticipated to introduce a novel framework for delivering reliable and uninterrupted power to low-energy medical devices like implantable pacemakers, neurostimulators, and wearable sensors. It is anticipated to be utilized not just for medical devices, but also for underwater drones and marine sensors that need prolonged energy supply.