There is a way to charge devices and implants directly in the water

The authors of the new work have figured out how to increase the efficiency of wireless energy transfer using

ultrasonic waves due to triboelectric energy generation. This approach could be used to wirelessly charge batteries underwater or in electronic devices implanted in the body.

As the population ages and medical technology advances,technologies around the world, there is an increasing number of patients using implanted electronic devices such as artificial pacemakers and defibrillators. Currently, batteries for such devices are replaced by a surgical incision, but this can lead to health complications. Therefore, the authors of the new work created a charging technology using wireless energy transfer, which can be used to charge underwater devices.

The authors of the work stated that for wirelesspower transmission can use electromagnetic induction and magnetic resonance. Electromagnetic induction is now used in smartphones and wireless headphones, but its use is limited because electromagnetic waves cannot travel through water or metal. Therefore, the charging distance is relatively short.

Moreover, this method is difficult to apply torecharging implanted medical devices, as the heat generated during charging is harmful. If you use the magnetic resonance method, then it is necessary that the resonant frequencies of the magnetic field generator and the transmitter are the same. In addition, there is a risk due to interference with other wireless frequencies such as Wi-Fi and Bluetooth.

So the team used ultrasonic waves.Ultrasonic wave sonar, typically used underwater. Their safety has also been proven in various medical studies. The research team developed a model that receives and converts ultrasonic waves into electrical energy using the triboelectric principle, which effectively converts small mechanical vibrations into electrical energy.

The authors added to the triboelectric generatorferroelectric material and ultrasonic energy transmission efficiency increased from less than 1% to more than 4%. The charging power was 8 MW at a distance of 6 cm, which was enough to drive 200 LEDs at the same time or transmit Bluetooth sensor data underwater.

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