IIT indore’s Breakthrough

In a remarkable technological advancement, the Indian Institute of Technology (IIT) Indore, in collaboration with the Defence Research and Development Organisation (DRDO), has developed innovative footwear embedded with triboelectric nanogenerator (TENG) technology. Unveiled in August 2024, these self-powered shoes generate electricity from every step a person takes and offer real-time location tracking. This groundbreaking invention holds transformative potential for both military and civilian applications, marking a significant step forward in sustainable energy and wearable technology.

How the Technology Works

The smart shoes utilize the triboelectric effect, a phenomenon where friction between two materials—such as Fluorinated Ethylene Propylene (FEP) and Aluminum—generates electrostatic charges. As the wearer walks, the contact and separation of these materials within the shoe sole convert mechanical energy into electrical energy through electrostatic induction. This energy, typically in the range of milliwatts, is stored in a compact device embedded in the sole, sufficient to power small electronics like sensors, GPS modules, and transmitters. The project, led by IIT Indore Director Professor Suhas Joshi and Professor I.A. Palani, along with researchers Anshu Sahu, Diksha Jaurker, Shailesh M. Kohle, and Bibhuti Bhusan Padhya, showcases cutting-edge engineering tailored to practical use.

The shoes are equipped with advanced features:

• GPS Module: Provides precise, satellite-based real-time location tracking, ensuring accurate positioning even in remote areas.
• RFID (Radio Frequency Identification): Offers a 50-meter range for short-distance identification, useful for attendance monitoring or coordination.
  This combination makes the footwear self-sustaining, eliminating the need for external batteries or frequent recharging.

Designed for Soldiers, Benefiting Society

Primarily developed for the Indian armed forces, these smart shoes enhance soldier safety and operational efficiency. The real-time tracking capability allows military commanders to monitor troop movements during missions, reducing risks in challenging terrains or hostile environments. The first batch of 10 pairs was delivered to DRDO in August 2024 for rigorous testing and evaluation, with plans for broader deployment pending successful outcomes.

Beyond military use, the technology has wide-ranging civilian applications:

• Safety and Monitoring: Real-time tracking for elderly individuals with conditions like Alzheimer’s or children during school hours.
• Workplace Efficiency: RFID-enabled attendance systems for factories, schools, or offices.
• Health and Fitness: Powering wearable devices for gait analysis, performance tracking, or health monitoring.
• Remote Applications: Supplying energy to sensors in isolated areas or integrating with the Internet of Things (IoT) for smart environments.

The innovation was prominently showcased at IIT Indore’s IInvenTive 2024 event in January 2024, where it was hailed as a “triboelectric-based shoe sole for energy harvesting to power microdevices for army personnel.” This demonstration highlighted India’s growing prowess in nanotechnology and sustainable energy solutions.

The Science Behind the Innovation

TENG technology is eco-friendly, cost-effective, and ideal for harvesting energy from human motion or environmental vibrations. IIT Indore’s research extends beyond footwear, with studies on enhancing TENG performance using advanced materials like nanostructures (e.g., Ru/g-C3N4 in PDMS matrices). These innovations have achieved output voltages of up to ~840 V in laboratory tests, thanks to scalable, one-step synthesis methods using synchrotron X-ray irradiation. This positions IIT Indore as a key player in the global TENG market, projected to grow from USD 1.47 billion in 2023 to USD 13.56 billion by 2033, with a compound annual growth rate (CAGR) of 24.88%.

Challenges and Future Prospects

Despite its promise, TENG technology faces challenges such as low energy conversion efficiency in humid conditions, durability under prolonged wear, and scalability for mass production. IIT Indore’s designs address these issues with robust materials like FEP-Aluminum pairs and ongoing research into hybrid systems. Looking ahead, the institute aims to integrate TENG with piezoelectric or electromagnetic generators for higher energy output. Potential future applications include powering advanced wearables, blue energy harvesting from ocean waves, and expanding IoT ecosystems. As of September 2024, DRDO’s testing phase could pave the way for field deployment, with civilian prototypes anticipated in the near future.

A Step Toward a Sustainable Future

IIT Indore’s smart shoes represent a fusion of nanotechnology, energy harvesting, and practical utility. By turning every step into a source of power, this invention not only supports national defense but also offers solutions for everyday life. As testing progresses and applications expand, these shoes could revolutionize how we think about wearable technology and renewable energy. For more details, interested readers can explore IIT Indore’s official publications or updates from DRDO.