Transcutaneous ultrasound energy harvesting using capacitive triboelectric technology
By Ronan Hinchet, Hong‐Joon Yoon, Hanjun Ryu, Moo-Kang Kim, E. Choi, Dong–Sun Kim, Sang‐Woo Kim. Science, 2019
718 citations recorded by the source corpus.
A sound way to deliver power Implanted medical devices, such as pacemakers and neurological stimulators, require a source of power, usually in the form of a battery. If a battery is implanted with the device, replacing it would require additional surgery. On the other hand, external power packs are prone to lead to infections where their wires enter the body. Hinchet et al. describe a triboelectric generator that can convert externally applied ultrasound into an internal electricity source capable of delivering sufficient energy to recharge a battery on a daily basis. Science, this issue p. 491 An implantable triboelectric generator can harvest ultrasound through skin and liquids to supply power to medical implants. A major challenge for implantable medical systems is the inclusion or reliable delivery of electrical power. We use ultrasound to deliver mechanical energy through skin and liquids and demonstrate a thin implantable vibrating triboelectric generator able to effectively harvest it. The ultrasound can induce micrometer-scale displacement of a polymer thin membrane to generate electrical energy through contact electrification. We recharge a lithium-ion battery at a rate of 166 microcoulombs per second in water. The voltage and current generated ex vivo by ultrasound energy transfer reached 2.4 volts and 156 microamps under porcine tissue. These findings show that a capacitive triboelectric electret is the first technology able to compete with piezoelectricity to harvest ultrasound in vivo and to power medical implants.
Subfields: Biomedical Engineering, Mechanical Engineering, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/0654feca7c35bd8950e6847d3b8a3624d1caa6c1
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Citations in the corpus
- Progress in wearable electronics/photonics—Moving toward the era of artificial intelligence and internet of things (2020, background): “293 The implantable TENG is designed to be inserted underneath the skin, which consists of a perfluoroalkoxy (PFA) membrane that is able to vibrate under the pressure of ultrasound.”
- Promoting smart cities into the 5G era with multi-field Internet of Things (IoT) applications powered with advanced mechanical energy harvesters (2021, background): “Besides scavenging biomechanical energy from the heart, Hinchet et al. introduced another strategy for transcutaneous ultrasound energy harvesting to enhance implantable devices [437].”