The novel contactless electricity generation technique leverages practical compressed air along with a Tesla turbine structure

The electrostatic potential of particular matter is a promising resource for energy harvesting. In a recent breakthrough, a team of researchers from Chung-Ang University has developed a next-generation Tesla turbine-inspired structure for contactless electricity generation. The proposed technology utilizes electrostatic charges and the viscous force of compressed air to achieve a peak output of 800 V and 2.5 A at frequency of 325 Hz.

Title: Tesla turbine–Inspired Design for Contactless Electricity Generation

Caption: Researchers have demonstrated a particulate static effect-induced electricity generation technology inspired by the Tesla turbine.

Credit: Professor Sangmin Lee from Chung-Ang University, Republic of Korea via Google Gemini

Image source link: Image was generated by Gemini AI

License type: Original content

Usage restrictions: Cannot be reused without permission.

The demand for energy is ever-increasing across various industries. In recent decades, scientists have explored the electrostatic potential of particulate matter as a highly promising avenue for energy harvesting. However, this technology poses ignition risks that can cause significant harm owing to uncontrolled electrical discharge. While some studies have attempted to mitigate this issue by introducing additional particles or water, these approaches lead to restricted applicability and also ignore the high electric potential.

In previous research, a team of researchers from South Korea, including Professor Sangmin Lee from the School of Mechanical Engineering, Chung-Ang University, Republic of Korea, comprehensively studied several nanogenerators that can effectively harvest low-speed wind energy. “During the research, we were curious about what would happen if high-speed—or high-pressure—wind blows onto the triboelectric nanogenerator. So, we fabricated a Tesla turbine-inspired triboelectric nanogenerator structure that can be operated with high-pressure air and analyzed the data. From these results, we observed the particulate static effect: the particulate matter in air can also generate surface charge on the triboelectric layer,” remarks Dr. Lee.

Now, a team of researchers led by Dr. Sangmin Lee, including Seh-Hoon Chung, Chanui Lee, and Sunghan Kim from Chung-Ang University; Dongwon Seo and Jihoon Chung from Kumoh National Institute of Technology (KIT), Republic of Korea; Hyungseok Yong from the Massachusetts Institute of Technology (MIT), USA; and Zong-Hong Lin from National Taiwan University, Taiwan, has harnessed this effect to develop a Tesla turbine-inspired electricity generator that can generate electrostatic discharge (ESD)-based electrical output with high pressure air. Their novel findings were published online in the journal Advanced Energy Materials on December 28, 2025.

This is the first study to demonstrate electricity generation via the particulate static effect by using a Tesla turbine structure. The proposed device can be operated solely with practical compressed air and leverages its electrostatic charges and viscous force to achieve high performance.

Dr. Lee explains the operational mechanism of their technology. “The viscous force of compressed air induces rotational motion within the device. Tribo-negative and tribo-positive layers inside acquire surface charge from the particulate static effect without the need for frictional sliding, allowing operation similar to non-contact tribo-electric generators. This facilitates electricity generation via electrostatic induction in the rotating electrodes, and the frictionless rotation enables high-frequency peak outputs.”

The researchers analyzed the particulate static effect of their innovation by measuring the transferred charge of compressed air and conducting electrostatic force microscopy mapping of the triboelectric layer. By using this effect, the Tesla turbine-inspired generator generated up to 800 V and 2.5 A of high ESD-based outputs at 325 Hz at a high rotational speed of 8,472 revolutions per minute.

In this study, the team further demonstrates that their generator can successfully power various electronic devices, facilitate water collection from moisture in the air, and remove airborne dust with high output.

In terms of real-life applications, the device developed in the present work can be applied in industrial environments where large amounts of compressed air and wasted airflow are commonly generated. Moreover, with its high-voltage output, this device can be used to power several electronics or regulate humidity and airborne dust by generating negative ions.

Lastly, this work can further inspire a wide variety of interdisciplinary studies—spanning a wide range of industrial applications—that leverage the concept of particulate static effect-based electricity generation.

Reference

About Chung-Ang University

Chung-Ang University is a leading private research university in Seoul, South Korea, dedicated to shaping global leaders for an evolving world. Founded in 1916 and achieving university status in 1953, it combines academic tradition with a strong commitment to innovation. Fully accredited by the Ministry of Education, CAU excels in fields such as pharmacy, medicine, engineering, and applied sciences, driving impactful discoveries and technological progress. Its research-intensive environment fosters collaboration and excellence, producing scholars and professionals who lead in their disciplines. Committed to global engagement, CAU continues to expand its influence as a hub for scientific advancement and future-driven education.

Website: https://neweng.cau.ac.kr/index.do

About Professor Sangmin Lee

Dr. Sangmin Lee received his Ph.D. in Mechanical Engineering from Pohang University of Science and Technology (POSTECH) in 2011. He teaches at Chung-Ang University, where he is an Professor in the School of Mechanical Engineering. His group carries out research in the field of energy harvesting based on electrostatic potential, piezoelectric/triboelectric nanogenerators, and hybrid cells. His research interests also lie in surface wetting control, including superhydrophobicity/superhydrophilicity based on micro and nanofabrications, and mechanical characterization of micro- and nanostructures surfaces.

Website: https://scholarworks.bwise.kr/cau/researcher-profile?ep=919