Trend AnalysisEngineering

Energy Harvesting for IoT: Piezoelectric and Triboelectric Self-Powered Sensors

The Internet of Things envisions billions of distributed sensors monitoring infrastructure, environment, and health. Powering them with batteries creates a maintenance nightmare โ€” replacing billions o...

By Sean K.S. Shin
This blog summarizes research trends based on published paper abstracts. Specific numbers or findings may contain inaccuracies. For scholarly rigor, always consult the original papers cited in each post.

The Question

The Internet of Things envisions billions of distributed sensors monitoring infrastructure, environment, and health. Powering them with batteries creates a maintenance nightmare โ€” replacing billions of batteries is impractical and environmentally costly. Energy harvesting converts ambient mechanical energy (vibrations, human motion, fluid flow) into electricity, enabling self-powered, maintenance-free sensors. Piezoelectric nanogenerators (PENGs) and triboelectric nanogenerators (TENGs) are the leading transduction mechanisms. Can they generate enough power for practical IoT sensor nodes?

Landscape

Afshar et al. (2025) reviewed energy harvesting technologies for self-powered wearable devices, with focus on polymer-based materials. Polymers (PVDF, PDMS, PU) offer flexibility, biocompatibility, and low cost โ€” essential for skin-worn devices. Their review documented that hybrid systems integrating multiple energy harvesting mechanisms can maximize power generation by capturing different frequency ranges and motion types simultaneously.

Jaiswal et al. (2024) developed a sodium niobate nanowire-embedded TENG that simultaneously harvests energy and serves as a self-powered CO gas sensor. This dual-function approach addresses a key limitation: most IoT sensors need both power and sensing capability. By combining both in a single device, the system complexity and cost are dramatically reduced.

Hussain et al. (2025) reviewed piezoelectric-triboelectric hybrid nanogenerators, showing that hybrid designs achieve higher power density (ยตW to mW range) sufficient to drive low-power microcontrollers and wireless transmitters for IoT applications. The hybrid approach also improves energy harvesting across a broader range of mechanical inputs.

S. Yang et al. (2025) demonstrated CNT-doped polyurethane TENGs for motion sensing, achieving both energy harvesting and gesture recognition from a single flexible film โ€” relevant for human-machine interaction in wearable IoT devices.

Key Claims & Evidence

<
ClaimEvidenceVerdict
Hybrid PENG+TENG generates more power than single mechanismReview of polymer-based hybrid systems (Afshar et al. 2025)Supported; hybrid designs emerging as standard
Single devices can simultaneously harvest energy and senseNaNbOโ‚ƒ/PVA TENG doubles as CO gas sensor (Jaiswal et al. 2024)Demonstrated; multi-functional integration is a design trend
ยตW-mW power output is sufficient for IoT sensor nodesHybrid nanogenerators power BLE transmitters and MCUs (Hussain et al. 2025)Supported for low-duty-cycle sensing; continuous sensing needs energy storage
CNT-doped polymers improve TENG performanceEnhanced output and mechanical durability (S. Yang et al. 2025)Supported; nanofiller optimisation ongoing

Open Questions

  • Power management: Nanogenerator output is irregular and low-voltage. Can power management circuits efficiently rectify, store, and regulate this output for digital electronics?
  • Durability: How do polymer-based nanogenerators perform after millions of mechanical cycles over years of deployment?
  • Scalable manufacturing: Can roll-to-roll printing produce nanogenerators at the cost and volume needed for billion-device IoT?
  • Environmental conditions: How does performance vary across temperature, humidity, and contamination โ€” the real conditions of infrastructure monitoring?
  • Referenced Papers

    • [1] Afshar, H. et al. (2025). Energy Harvesting Technologies for Self-Powered Wearable Devices. Polymers for Advanced Technologies. DOI: 10.1002/pat.70187
    • [2] Jaiswal, M. et al. (2024). NaNbOโ‚ƒ/PVA-Hydrogel TENG for Energy Harvesting and Self-Powered CO Sensor. Small. DOI: 10.1002/smll.202403699
    • [3] Hussain, S.Z. et al. (2025). Piezoelectric-Triboelectric Hybrid Nanogenerator for Self-Powered Sensing. Small. DOI: 10.1002/smll.202504626
    • [4] Mahanty, B. & Lee, D.-W. (2024). Advancements in Energy Harvesting for Self-powered Sensor Systems. Int. J. Precision Engineering and Manufacturing. DOI: 10.57062/ijpem-st.2024.00080
    • [5] Yang, S. et al. (2025). CNT-Doped PU Nanocomposite TENG for Mechanical Energy Harvesting. ACS Appl. Mater. Interfaces. DOI: 10.1021/acsami.5c05754

    References (5)

    Afshar, H., Kamran, F., & Shahi, F. (2025). Recent Progress in Energy Harvesting Technologies for Selfโ€Powered Wearable Devices: The Significance of Polymers. Polymers for Advanced Technologies, 36(4).
    Jaiswal, M., Singh, S., Sharma, B., Choudhary, S., Kumar, R., & Sharma, S. K. (2024). Sodium Niobate Nanowires Embedded PVAโ€Hydrogelโ€Based Triboelectric Nanogenerator for Versatile Energy Harvesting and Selfโ€Powered CO Gas Sensor. Small.
    Hussain, S. Z., Singh, V. P., Sadeque, M. S. B., Yavari, S., Kalimuldina, G., & Ordu, M. (2025). Piezoelectricโ€Triboelectric Hybrid Nanogenerator for Energy Harvesting and Selfโ€Powered Sensing Applications. Small, 21(43).
    Mahanty, B., & Lee, D. (2024). Advancements in Energy Harvesting: Piezoelectric, Triboelectric, Pyroelectric, and Magnetoelectric Technologies for Self-powered Sensor Systems. International Journal of Precision Engineering and Manufacturing-Smart Technology, 2(2), 151-167.
    Yang, S., Goncharenko, D. V., Ji, P., Grozova, N. A., Semencha, A. V., Larionova, T. V., et al. (2025). A Carbon Nanotube-Doped Polyurethane Nanocomposite-Based Triboelectric Nanogenerator: A Platform for Efficient Mechanical Energy Harvesting and Self-Powered Motion Sensing. ACS Applied Materials & Interfaces, 17(26), 38469-38480.

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