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A Body Conformal Ultrasound Receiver for Efficient and Stable Wireless Power Transfer in Deep Percutaneous Charging
Iman M Imani1, Hyun Soo Kim2, Minhyuk Lee2
1Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea.
Advanced Materials (Deerfield Beach, Fla.)
|March 26, 2025
Summary
A new ultrasound-driven triboelectric nanogenerator (US-TENG) offers efficient wireless powering for implantable medical devices. This flexible device enables reliable, deep charging, reducing the need for invasive battery replacement surgeries.
Area of Science:
- Biomedical Engineering
- Materials Science
- Energy Harvesting
Background:
- Wireless powering of implantable medical devices is crucial but faces challenges in reliability and safety.
- Current ultrasound-driven triboelectric nanogenerators (US-TENG) have limitations in output performance and flexibility.
- Frequent surgeries for battery replacement in implantable devices pose risks and increase healthcare costs.
Purpose of the Study:
- To develop an enhanced ultrasound-driven triboelectric nanogenerator (US-TENG) with improved output performance and flexibility.
- To address the limitations of existing US-TENG devices for reliable wireless powering of implantable medical devices.
- To demonstrate the feasibility of deep, short-term wireless charging for implantable electronics under flexing conditions.
Main Methods:
- Development of a dielectric-ferroelectric boosted US-TENG (US-TENGDF-B).
- Testing the device's output performance under low-intensity ultrasound and varying probe distances.
- Evaluating the stability and feasibility of the deformable US-TENGDF-B under different bending conditions.
Main Results:
- The US-TENGDF-B achieved a high output charge with low-intensity ultrasound and a long probe distance.
- The device demonstrated stable performance under various bending conditions, confirming its suitability for curved anatomical locations.
- An output of approximately 26 V and 6.7 mW was achieved for remote charging of a rechargeable battery at a 35 mm distance.
Conclusions:
- The output-augmented US-TENGDF-B is effective for deep, short-term wireless charging of implantable electronics.
- The device's flexibility and stable output make it suitable for curved body positions and dynamic applications like artificial hearts.
- This technology has the potential to significantly reduce the need for invasive surgeries for battery replacement in medical implants.
